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PENILAIAN AKHIR SEMESTER BAHASA INGGRIS WAJIB

Total questions: 25

Worksheet time: 25mins

Name
Class
Date
1.

Recycling is a collection, processing, and reuse of materials that would otherwise be thrown away. Materials ranging from precious metals to broken glass, from old newspapers to plastic spoons, can be recycled. The recycling process reclaims the original material and uses it in new products.

In general, using recycled materials to make new products costs less and requires less energy than using new materials. Recycling can also reduce pollution, either by reducing the demand for high-pollution alternatives or by minimizing the amount of pollution produced during the manufacturing process.

Paper products that can be recycled include cardboard containers, wrapping paper, and office paper. The most commonly recycled paper product is newsprint. In newspaper recycling, old newspapers are collected and searched for contaminants such as plastic bags and aluminum foil. The paper goes to a processing plant where it is mixed with hot water and turned into pulp in a machine that works much like a big kitchen blender. The pulp is screened and filtered to remove smaller contaminants. The pulp then goes to a large vat where the ink separates from the paper fibers and fl oats to the surface. The ink is skimmed off, dried and reused as ink or burned as boiler fuel. The cleaned pulp is mixed with new wood fibers to be made into paper again.

Experts estimate the average office worker generates about 5 kg of wastepaper per month. Every ton of paper that is recycled saves about 1.4 cu m (about 50 cu ft) of landfill space. One ton of recycled paper saves 17 pulpwood trees (trees used to produce paper).


The following things can be recycled, EXCEPT…

a)

Precious metals

b)

Broken glass

c)

Old newspapers

d)

Plastic spoons

e)

Fresh vegetables and fruits

2.

Recycling is a collection, processing, and reuse of materials that would otherwise be thrown away. Materials ranging from precious metals to broken glass, from old newspapers to plastic spoons, can be recycled. The recycling process reclaims the original material and uses it in new products.

In general, using recycled materials to make new products costs less and requires less energy than using new materials. Recycling can also reduce pollution, either by reducing the demand for high-pollution alternatives or by minimizing the amount of pollution produced during the manufacturing process.

Paper products that can be recycled include cardboard containers, wrapping paper, and office paper. The most commonly recycled paper product is newsprint. In newspaper recycling, old newspapers are collected and searched for contaminants such as plastic bags and aluminum foil. The paper goes to a processing plant where it is mixed with hot water and turned into pulp in a machine that works much like a big kitchen blender. The pulp is screened and filtered to remove smaller contaminants. The pulp then goes to a large vat where the ink separates from the paper fibers and fl oats to the surface. The ink is skimmed off, dried and reused as ink or burned as boiler fuel. The cleaned pulp is mixed with new wood fibers to be made into paper again.

Experts estimate the average office worker generates about 5 kg of wastepaper per month. Every ton of paper that is recycled saves about 1.4 cu m (about 50 cu ft) of landfill space. One ton of recycled paper saves 17 pulpwood trees (trees used to produce paper).


Which of the following is NOT the benefit of recycling?

a)

It costs much money for the process of recycling

b)

It costs less to make new products

c)

It requires less energy

d)

It can reduce pollution

e)

It reduces the demand for high-pollution alternatives

3.

Recycling is a collection, processing, and reuse of materials that would otherwise be thrown away. Materials ranging from precious metals to broken glass, from old newspapers to plastic spoons, can be recycled. The recycling process reclaims the original material and uses it in new products.

In general, using recycled materials to make new products costs less and requires less energy than using new materials. Recycling can also reduce pollution, either by reducing the demand for high-pollution alternatives or by minimizing the amount of pollution produced during the manufacturing process.

Paper products that can be recycled include cardboard containers, wrapping paper, and office paper. The most commonly recycled paper product is newsprint. In newspaper recycling, old newspapers are collected and searched for contaminants such as plastic bags and aluminum foil. The paper goes to a processing plant where it is mixed with hot water and turned into pulp in a machine that works much like a big kitchen blender. The pulp is screened and filtered to remove smaller contaminants. The pulp then goes to a large vat where the ink separates from the paper fibers and fl oats to the surface. The ink is skimmed off, dried and reused as ink or burned as boiler fuel. The cleaned pulp is mixed with new wood fibers to be made into paper again.

Experts estimate the average office worker generates about 5 kg of wastepaper per month. Every ton of paper that is recycled saves about 1.4 cu m (about 50 cu ft) of landfill space. One ton of recycled paper saves 17 pulpwood trees (trees used to produce paper).


What is the third step of recycling paper products?

a)

Collect and search for contaminants such as plastic bags and aluminium foil

b)

Mix the paper with hot water in a blender which turns it into pulp

c)

Screen and filter the pulp to remove smaller contaminants

d)

Put the pulp to a large vat to separate the ink from the paper fibres

e)

Mix the pulp with new wood fibres to be made into paper again

4.

Recycling is a collection, processing, and reuse of materials that would otherwise be thrown away. Materials ranging from precious metals to broken glass, from old newspapers to plastic spoons, can be recycled. The recycling process reclaims the original material and uses it in new products.

In general, using recycled materials to make new products costs less and requires less energy than using new materials. Recycling can also reduce pollution, either by reducing the demand for high-pollution alternatives or by minimizing the amount of pollution produced during the manufacturing process.

Paper products that can be recycled include cardboard containers, wrapping paper, and office paper. The most commonly recycled paper product is newsprint. In newspaper recycling, old newspapers are collected and searched for contaminants such as plastic bags and aluminum foil. The paper goes to a processing plant where it is mixed with hot water and turned into pulp in a machine that works much like a big kitchen blender. The pulp is screened and filtered to remove smaller contaminants. The pulp then goes to a large vat where the ink separates from the paper fibers and fl oats to the surface. The ink is skimmed off, dried and reused as ink or burned as boiler fuel. The cleaned pulp is mixed with new wood fibers to be made into paper again.

Experts estimate the average office worker generates about 5 kg of wastepaper per month. Every ton of paper that is recycled saves about 1.4 cu m (about 50 cu ft) of landfill space. One ton of recycled paper saves 17 pulpwood trees (trees used to produce paper).


We can make use of the ink after being separated from the paper fibres by doing the followings, EXCEPT…

a)

Skim it off

b)

Dry it

c)

Reuse as ink

d)

Burn as boiler fuel

e)

Mix it with the pulp

5.

Human body is made up of countless millions of cells. Food is needed to built up new cells and replace the worn out cells. However, the food that we take must be changed into substances that can be carried in the blood to the places where they are needed. This process is called digestion.

The first digestive process takes place in the mouth. The food we eat is broken up into small pieces by the action of teeth, mixed with saliva, a juice secreted by glands in the mouth. Saliva contains digestive juice which moisten the food, so it can be swallowed easily.

From the mouth, food passes through the esophagus (the food passage) into the stomach. Here, the food is mixed with the juices secreted by the cells in the stomach for several hours.

Then the food enters the small intestine. All the time the muscular walls of the intestine are squeezing, mixing and moving the food onwards.In a few hours, the food changes into acids. These are soon absorbed by the villi (microscopic branch projections from the intestine walls) and passed into the bloodstream.


What is the text about?

a)

The digestive system

b)

The digestive juice

c)

The method of the digestive system

d)

The process of intestine work

e)

The food substances

6.

Human body is made up of countless millions of cells. Food is needed to built up new cells and replace the worn out cells. However, the food that we take must be changed into substances that can be carried in the blood to the places where they are needed. This process is called digestion.

The first digestive process takes place in the mouth. The food we eat is broken up into small pieces by the action of teeth, mixed with saliva, a juice secreted by glands in the mouth. Saliva contains digestive juice which moisten the food, so it can be swallowed easily.

From the mouth, food passes through the esophagus (the food passage) into the stomach. Here, the food is mixed with the juices secreted by the cells in the stomach for several hours.

Then the food enters the small intestine. All the time the muscular walls of the intestine are squeezing, mixing and moving the food onwards.In a few hours, the food changes into acids. These are soon absorbed by the villi (microscopic branch projections from the intestine walls) and passed into the bloodstream.


How can we swallow the food easily?

a)

The food changes into acids absorbed by the villi

b)

The food must be digested first through the process.

c)

The food is directly swallowed through esophagus into the stomach

d)

The food is mixed with the juices secreted by the cells in the stomach

e)

The food we take must be changed into substances carried in the blood to the places

7.

Human body is made up of countless millions of cells. Food is needed to built up new cells and replace the worn out cells. However, the food that we take must be changed into substances that can be carried in the blood to the places where they are needed. This process is called digestion.

The first digestive process takes place in the mouth. The food we eat is broken up into small pieces by the action of teeth, mixed with saliva, a juice secreted by glands in the mouth. Saliva contains digestive juice which moisten the food, so it can be swallowed easily.

From the mouth, food passes through the esophagus (the food passage) into the stomach. Here, the food is mixed with the juices secreted by the cells in the stomach for several hours.

Then the food enters the small intestine. All the time the muscular walls of the intestine are squeezing, mixing and moving the food onwards.In a few hours, the food changes into acids. These are soon absorbed by the villi (microscopic branch projections from the intestine walls) and passed into the bloodstream.


From the text above, we imply that …

a)

a good process of digestive system will help our body becoming healthier

b)

no one concerned with the process of digestive system for their health

c)

the digestive system is needed if we are eating the food instantly

d)

every body must conduct the processes of digestive system well.

e)

the better we digest the food we eat, the healthier we will be

8.

Human body is made up of countless millions of cells. Food is needed to built up new cells and replace the worn out cells. However, the food that we take must be changed into substances that can be carried in the blood to the places where they are needed. This process is called digestion.

The first digestive process takes place in the mouth. The food we eat is broken up into small pieces by the action of teeth, mixed with saliva, a juice secreted by glands in the mouth. Saliva contains digestive juice which moisten the food, so it can be swallowed easily.

From the mouth, food passes through the esophagus (the food passage) into the stomach. Here, the food is mixed with the juices secreted by the cells in the stomach for several hours.

Then the food enters the small intestine. All the time the muscular walls of the intestine are squeezing, mixing and moving the food onwards.In a few hours, the food changes into acids. These are soon absorbed by the villi (microscopic branch projections from the intestine walls) and passed into the bloodstream.


“Human body is made up of countless millions of cells.” (Paragraph 1) The phrase “made up” means ….

a)

produced

b)

managed

c)

arranged

d)

completed

e)

constructed

9.

Have you ever wondered how people get chocolate from? In this article we’ll enter the amazing world of chocolate so you can understand exactly what you’re eating.

Chocolate starts with a tree called the cacao tree. This tree grows in equatorial regions, especially in places such as South America, Africa, and Indonesia. The cacao tree produces a fruit about the size of a small pine apple. Inside the fruit are the tree’s seeds, also known as cocoa beans.

The beans are fermented for about a week, dried in the sun and then shipped to the chocolate maker. The chocolate maker starts by roasting the beans to bring out the flavour. Different beans from different places have different qualities and flavor, so they are often sorted and blended to produce a distinctive mix. Next, the roasted beans are winnowed. Winnowing removes the meat nib of the cacao bean from its shell. Then, the nibs are blended. The blended nibs are ground to make it a liquid. The liquid is called chocolate liquor. It tastes bitter. All seeds contain some amount of fat, and cacao beans are not different. However, cacao beans are half fat, which is why the ground nibs form liquid. It’s pure bitter chocolate.


The text is about …

a)

the cacao tree

b)

the cacao beans

c)

the raw chocolate

d)

the making of chocolate

e)

the flavour of chocolate

10.

Have you ever wondered how people get chocolate from? In this article we’ll enter the amazing world of chocolate so you can understand exactly what you’re eating.

Chocolate starts with a tree called the cacao tree. This tree grows in equatorial regions, especially in places such as South America, Africa, and Indonesia. The cacao tree produces a fruit about the size of a small pine apple. Inside the fruit are the tree’s seeds, also known as cocoa beans.

The beans are fermented for about a week, dried in the sun and then shipped to the chocolate maker. The chocolate maker starts by roasting the beans to bring out the flavour. Different beans from different places have different qualities and flavor, so they are often sorted and blended to produce a distinctive mix. Next, the roasted beans are winnowed. Winnowing removes the meat nib of the cacao bean from its shell. Then, the nibs are blended. The blended nibs are ground to make it a liquid. The liquid is called chocolate liquor. It tastes bitter. All seeds contain some amount of fat, and cacao beans are not different. However, cacao beans are half fat, which is why the ground nibs form liquid. It’s pure bitter chocolate.


The third paragraph focuses on …

a)

the process of producing chocolate

b)

how to produce the cocoa flavour

c)

where chocolate comes from

d)

the chocolate liquor

e)

the cacao fruit

11.

Apt BLK 30, Eunos St. 05 – 116

Singapore 1441

2nd April 2009

Dear Liza,

I have received you letter asking me to meet you at your house this Sunday to discuss the urgent matter you have. I regret however to say that it will not be possible for me to see you on Sunday as I already have a previous appointment . I shall see you on Monday next week at 5 p.m . Hoping the change of date will be convenient to you .

Your sincerely

Didi


What does the letter tell about ….

a)

Liza’s problem

b)

Liza’s appointment

c)

Daisy’s previous letter to Liza

d)

Daisy’s regret for not being able to come (Jawaban Benar)

e)

A meeting held at Liza’s house

12.

Apt BLK 30, Eunos St. 05 – 116

Singapore 1441

2nd April 2009

Dear Liza,

I have received you letter asking me to meet you at your house this Sunday to discuss the urgent matter you have. I regret however to say that it will not be possible for me to see you on Sunday as I already have a previous appointment . I shall see you on Monday next week at 5 p.m . Hoping the change of date will be convenient to you .

Your sincerely

Didi


Why did Liza ask Daisy to come to her house….

a)

Liza wanted Daisy to solve her problem

b)

Daisy would discuss her problem with Liza

c)

Liza persuaded Daisy to go somewhere

d)

Daisy wanted to meet Liza’s family

e)

Liza wanted to chat with Daisy

13.

Jambu 129 Bima

30th January 2017

Dear Frodi,It was a real sorrow that I heard this morning of your great loss. I knew your mother was ill, for your brother told me several weeks ago. However, as he at that time did not seem to think the illness was very serious, the news of your mother’s death came to me as a shock. You have my sincere and heartfelt sympathy, my dear fellow, in your sorrow. I know you will feel it deeply, for you always thought so much of your mother and loved her so truly. I feel it also as a personal loss to myself, for your mother was always very kind to me. Her death must be a terrible grief to your father, too. Please assure him of my sincere sympathy.

Words, I know, are poor comforters. “The heart knows its own sorrow”, and in such sorrows we are always alone. However, it is not mere words when I say that I feel with you in your sorrow.

Your sincere friend,

JONI


What is the possible relation between the sender and the recipient?

a)

relatives

b)

employers

c)

friends

d)

siblings

e)

employees

14.

Jambu 129 Bima

30th January 2017

Dear Frodi,It was a real sorrow that I heard this morning of your great loss. I knew your mother was ill, for your brother told me several weeks ago. However, as he at that time did not seem to think the illness was very serious, the news of your mother’s death came to me as a shock. You have my sincere and heartfelt sympathy, my dear fellow, in your sorrow. I know you will feel it deeply, for you always thought so much of your mother and loved her so truly. I feel it also as a personal loss to myself, for your mother was always very kind to me. Her death must be a terrible grief to your father, too. Please assure him of my sincere sympathy.

Words, I know, are poor comforters. “The heart knows its own sorrow”, and in such sorrows we are always alone. However, it is not mere words when I say that I feel with you in your sorrow.

Your sincere friend,

JONI


From the letter we know that ….

a)

Frodi’s mother was not ill before her death

b)

Jean sent letter to Frodi several weeks ago

c)

Jean was very sorrowful to send the letter to his mother

d)

Jean had known Frodi’s mother before

e)

Frodi is the only child in his family

15.

Jambu 129 Bima

30th January 2017

Dear Frodi,It was a real sorrow that I heard this morning of your great loss. I knew your mother was ill, for your brother told me several weeks ago. However, as he at that time did not seem to think the illness was very serious, the news of your mother’s death came to me as a shock. You have my sincere and heartfelt sympathy, my dear fellow, in your sorrow. I know you will feel it deeply, for you always thought so much of your mother and loved her so truly. I feel it also as a personal loss to myself, for your mother was always very kind to me. Her death must be a terrible grief to your father, too. Please assure him of my sincere sympathy.

Words, I know, are poor comforters. “The heart knows its own sorrow”, and in such sorrows we are always alone. However, it is not mere words when I say that I feel with you in your sorrow.

Your sincere friend,

JONI


“You have my sincere and heartfelt sympathy, my dear fellow, in your sorrow.” What is the closest meaning of word “sincere”?

a)

real

b)

caring

c)

generous

d)

honest

e)

Curious

16.

Jambu 129 Bima

30th January 2017

Dear Frodi,It was a real sorrow that I heard this morning of your great loss. I knew your mother was ill, for your brother told me several weeks ago. However, as he at that time did not seem to think the illness was very serious, the news of your mother’s death came to me as a shock. You have my sincere and heartfelt sympathy, my dear fellow, in your sorrow. I know you will feel it deeply, for you always thought so much of your mother and loved her so truly. I feel it also as a personal loss to myself, for your mother was always very kind to me. Her death must be a terrible grief to your father, too. Please assure him of my sincere sympathy.

Words, I know, are poor comforters. “The heart knows its own sorrow”, and in such sorrows we are always alone. However, it is not mere words when I say that I feel with you in your sorrow.

Your sincere friend,

JONI


I was afraid to tell my mother my test score is so bad

a)

becaue

b)

Can

c)

Due of

d)

Thank

e)

Because of

17.

Jambu 129 Bima

30th January 2017

Dear Frodi,It was a real sorrow that I heard this morning of your great loss. I knew your mother was ill, for your brother told me several weeks ago. However, as he at that time did not seem to think the illness was very serious, the news of your mother’s death came to me as a shock. You have my sincere and heartfelt sympathy, my dear fellow, in your sorrow. I know you will feel it deeply, for you always thought so much of your mother and loved her so truly. I feel it also as a personal loss to myself, for your mother was always very kind to me. Her death must be a terrible grief to your father, too. Please assure him of my sincere sympathy.

Words, I know, are poor comforters. “The heart knows its own sorrow”, and in such sorrows we are always alone. However, it is not mere words when I say that I feel with you in your sorrow.

Your sincere friend,

JONI


You know, you are our strength. And we stand here today, play the game we used to play, get the champ it’s all …. You

a)

becaue

b)

Cans

c)

Due of

d)

Thank

e)

ecause

18.

Hanging ….(18) the cobwebs in your mind

It looks like a long, long way to fall

No one ever told me life was kind

I guess I never heard it, never heard it all


Choose

a)

from

b)

for

c)

to

d)

at

e)

will

19.

Living in a world of make believe

I can hide ….(19) what’s real


Choose

a)

beside

b)

behind

c)

front

d)

up

e)

Beneath

20.

But wearing your emotions on your sleeve

And they all know what you.....(20)


Choose

a)

see

b)

hear

c)

feel

d)

saw

e)

felt

21.

Acid rain is rain that is highly acidic because of sulfur oxides, nitrogen oxides, and other air pollutants dissolved in it. Normal rain is slightly acidic, with a pH of 6. Acid rain may have a pH value as low as 2.8.

Acid rain can severely damage both plant and animal life. Certain lakes, for example, have lost all fish and plant life because of acid rain.

Acid rain comes from sulfur in coal and oil. When they burn, they make sulfur dioxide (SO2 ). Most sulfur leaves factory chimneys as the gaseous sulfur dioxide (SO2 ) and most nitrogen are also emitted as one of the nitrogen oxides (NO or NO2 ), both of which are gasses. The gasses may be dry deposited–absorbed directly by the land, by lakes or by the surface vegetation. If they are in the atmosphere for anytime, the gasses will oxidize (gain an oxygen atom) and go into solution as acids. Sulphuric acid (H2 SO4 ) and the nitrogen oxides will become nitric acid (HNO3 ). The acids usually dissolve in cloud droplets and may travel great distances before being precipitated as acid rain.

Catalysts such as hydrogen peroxide, ozone, and ammonium help promote the formation of acids in clouds. More ammonium (NH4 ) can be formed when some of the acids are partially neutralized by airborne ammonia (NH3 ). Acidification increases with the number of active hydrogen (H+) ions dissolved in acid. Hydrocarbons emitted by, for example, car exhausts will react in sunlight with nitrogen oxides to produce ozone. Although it is invaluable in the atmosphere, low-level ozone causes respiratory problems and also hastens the formation of acid rain. When acid rain falls on the ground it dissolves and liberates heavy metals and aluminum (Al). When it is washed into lakes, aluminum irritates the outer surfaces of many fish. As acid rain falls or drains into the lake the pH of the lake falls. Forests suffer the effect of acid rain through damage to leaves, through the loss of vital nutrients, and through the increased amounts of toxic metals liberated by acid, which damage roots and soil microorganisms.


What is the text mainly about?

a)

The definition of acid rain

b)

The process of acid rain

c)

The effect of acid rain

d)

Acid rain

e)

Rain

22.

Acid rain is rain that is highly acidic because of sulfur oxides, nitrogen oxides, and other air pollutants dissolved in it. Normal rain is slightly acidic, with a pH of 6. Acid rain may have a pH value as low as 2.8.

Acid rain can severely damage both plant and animal life. Certain lakes, for example, have lost all fish and plant life because of acid rain.

Acid rain comes from sulfur in coal and oil. When they burn, they make sulfur dioxide (SO2 ). Most sulfur leaves factory chimneys as the gaseous sulfur dioxide (SO2 ) and most nitrogen are also emitted as one of the nitrogen oxides (NO or NO2 ), both of which are gasses. The gasses may be dry deposited–absorbed directly by the land, by lakes or by the surface vegetation. If they are in the atmosphere for anytime, the gasses will oxidize (gain an oxygen atom) and go into solution as acids. Sulphuric acid (H2 SO4 ) and the nitrogen oxides will become nitric acid (HNO3 ). The acids usually dissolve in cloud droplets and may travel great distances before being precipitated as acid rain.

Catalysts such as hydrogen peroxide, ozone, and ammonium help promote the formation of acids in clouds. More ammonium (NH4 ) can be formed when some of the acids are partially neutralized by airborne ammonia (NH3 ). Acidification increases with the number of active hydrogen (H+) ions dissolved in acid. Hydrocarbons emitted by, for example, car exhausts will react in sunlight with nitrogen oxides to produce ozone. Although it is invaluable in the atmosphere, low-level ozone causes respiratory problems and also hastens the formation of acid rain. When acid rain falls on the ground it dissolves and liberates heavy metals and aluminum (Al). When it is washed into lakes, aluminum irritates the outer surfaces of many fish. As acid rain falls or drains into the lake the pH of the lake falls. Forests suffer the effect of acid rain through damage to leaves, through the loss of vital nutrients, and through the increased amounts of toxic metals liberated by acid, which damage roots and soil microorganisms.


The acid of normal rain is .… then the acid rain

a)

Higher

b)

Lower

c)

Denser

d)

Severer

e)

The same

23.

Acid rain is rain that is highly acidic because of sulfur oxides, nitrogen oxides, and other air pollutants dissolved in it. Normal rain is slightly acidic, with a pH of 6. Acid rain may have a pH value as low as 2.8.

Acid rain can severely damage both plant and animal life. Certain lakes, for example, have lost all fish and plant life because of acid rain.

Acid rain comes from sulfur in coal and oil. When they burn, they make sulfur dioxide (SO2 ). Most sulfur leaves factory chimneys as the gaseous sulfur dioxide (SO2 ) and most nitrogen are also emitted as one of the nitrogen oxides (NO or NO2 ), both of which are gasses. The gasses may be dry deposited–absorbed directly by the land, by lakes or by the surface vegetation. If they are in the atmosphere for anytime, the gasses will oxidize (gain an oxygen atom) and go into solution as acids. Sulphuric acid (H2 SO4 ) and the nitrogen oxides will become nitric acid (HNO3 ). The acids usually dissolve in cloud droplets and may travel great distances before being precipitated as acid rain.

Catalysts such as hydrogen peroxide, ozone, and ammonium help promote the formation of acids in clouds. More ammonium (NH4 ) can be formed when some of the acids are partially neutralized by airborne ammonia (NH3 ). Acidification increases with the number of active hydrogen (H+) ions dissolved in acid. Hydrocarbons emitted by, for example, car exhausts will react in sunlight with nitrogen oxides to produce ozone. Although it is invaluable in the atmosphere, low-level ozone causes respiratory problems and also hastens the formation of acid rain. When acid rain falls on the ground it dissolves and liberates heavy metals and aluminum (Al). When it is washed into lakes, aluminum irritates the outer surfaces of many fish. As acid rain falls or drains into the lake the pH of the lake falls. Forests suffer the effect of acid rain through damage to leaves, through the loss of vital nutrients, and through the increased amounts of toxic metals liberated by acid, which damage roots and soil microorganisms.


What is the result of the burning of the coal and oil?

a)

Ammonium

b)

Nitric acid

c)

Sulphuric acid

d)

Sulfur dioxide

e)

Airborne ammonia

24.

Acid rain is rain that is highly acidic because of sulfur oxides, nitrogen oxides, and other air pollutants dissolved in it. Normal rain is slightly acidic, with a pH of 6. Acid rain may have a pH value as low as 2.8.

Acid rain can severely damage both plant and animal life. Certain lakes, for example, have lost all fish and plant life because of acid rain.

Acid rain comes from sulfur in coal and oil. When they burn, they make sulfur dioxide (SO2 ). Most sulfur leaves factory chimneys as the gaseous sulfur dioxide (SO2 ) and most nitrogen are also emitted as one of the nitrogen oxides (NO or NO2 ), both of which are gasses. The gasses may be dry deposited–absorbed directly by the land, by lakes or by the surface vegetation. If they are in the atmosphere for anytime, the gasses will oxidize (gain an oxygen atom) and go into solution as acids. Sulphuric acid (H2 SO4 ) and the nitrogen oxides will become nitric acid (HNO3 ). The acids usually dissolve in cloud droplets and may travel great distances before being precipitated as acid rain.

Catalysts such as hydrogen peroxide, ozone, and ammonium help promote the formation of acids in clouds. More ammonium (NH4 ) can be formed when some of the acids are partially neutralized by airborne ammonia (NH3 ). Acidification increases with the number of active hydrogen (H+) ions dissolved in acid. Hydrocarbons emitted by, for example, car exhausts will react in sunlight with nitrogen oxides to produce ozone. Although it is invaluable in the atmosphere, low-level ozone causes respiratory problems and also hastens the formation of acid rain. When acid rain falls on the ground it dissolves and liberates heavy metals and aluminum (Al). When it is washed into lakes, aluminum irritates the outer surfaces of many fish. As acid rain falls or drains into the lake the pH of the lake falls. Forests suffer the effect of acid rain through damage to leaves, through the loss of vital nutrients, and through the increased amounts of toxic metals liberated by acid, which damage roots and soil microorganisms.


The sulfur oxides and nitrogen oxides will …. in the air

a)

Be absorbed directly by the vegetation

b)

Dissolved in the lake water and land

c)

Emit another sulfur gas

d)

Radiate an oxygen atom

e)

Gain an oxygen atom

25.

Acid rain is rain that is highly acidic because of sulfur oxides, nitrogen oxides, and other air pollutants dissolved in it. Normal rain is slightly acidic, with a pH of 6. Acid rain may have a pH value as low as 2.8.

Acid rain can severely damage both plant and animal life. Certain lakes, for example, have lost all fish and plant life because of acid rain.

Acid rain comes from sulfur in coal and oil. When they burn, they make sulfur dioxide (SO2 ). Most sulfur leaves factory chimneys as the gaseous sulfur dioxide (SO2 ) and most nitrogen are also emitted as one of the nitrogen oxides (NO or NO2 ), both of which are gasses. The gasses may be dry deposited–absorbed directly by the land, by lakes or by the surface vegetation. If they are in the atmosphere for anytime, the gasses will oxidize (gain an oxygen atom) and go into solution as acids. Sulphuric acid (H2 SO4 ) and the nitrogen oxides will become nitric acid (HNO3 ). The acids usually dissolve in cloud droplets and may travel great distances before being precipitated as acid rain.

Catalysts such as hydrogen peroxide, ozone, and ammonium help promote the formation of acids in clouds. More ammonium (NH4 ) can be formed when some of the acids are partially neutralized by airborne ammonia (NH3 ). Acidification increases with the number of active hydrogen (H+) ions dissolved in acid. Hydrocarbons emitted by, for example, car exhausts will react in sunlight with nitrogen oxides to produce ozone. Although it is invaluable in the atmosphere, low-level ozone causes respiratory problems and also hastens the formation of acid rain. When acid rain falls on the ground it dissolves and liberates heavy metals and aluminum (Al). When it is washed into lakes, aluminum irritates the outer surfaces of many fish. As acid rain falls or drains into the lake the pH of the lake falls. Forests suffer the effect of acid rain through damage to leaves, through the loss of vital nutrients, and through the increased amounts of toxic metals liberated by acid, which damage roots and soil microorganisms.


Which of the following is not true about acid rain?

a)

It contains lower pH than the normal rain

b)

It has higher pH than the normal rain

c)

It can damage animal and plant life

d)

It contains dangerous gasses

e)

It endangers water life