7.1 THE COMPOSITION OF THE AIR

7.1 THE COMPOSITION OF THE AIR

by KASMAWATI Moe

Multiple Choice

The following are the steps that we can take to help maintain the level of oxygen in the atmosphere except....

• Replanting new trees

• Planting more trees

• Preventing illegal logging from destroying the forest

• Using more chemical fertiliser so that plants will be flourish

Multiple Choice

Which of the following is the reason of the increase in carbon dioxide in the air?

I Release of smoke from factories

II Uncontrolled logging

III Excessive fuel consumption

IV Uncontrolled rusting of metals

• I and II

• I, II and III

• I, II and IV

• All of the above

Multiple Choice

Oxygen is constantly used by different processes on the planet. Which of the following process does not consume oxygen?

• Respiration

• Rusting

• Decomposition

• Photosynthesis

Multiple Choice

Which of the following statements are correct about carbon?

I Carbon is cycled among earth's oceans, atmosphere and ecosystem.

II All living things are built of carbon

III Carbon is a fundamental building block of life

IV Carbon dioxide traps heat in the atmosphere and helps to prevent earth from plunging into subfreezing temperature.

• I, II and III

• I, III and IV

• II, III and IV

• All of the above

Multiple Choice

Diagram shows the applicaton involving the usage of gas. What gas is used in this application?

• Carbon dioxide

• Nitrogen

• Oxygen

• Helium

Multiple Choice

Which of the following gases has the highest composition in the air?

• Oxygen

• Nitrogen

• Inert gases

• Carbon dioxide

Multiple Choice

Which of the following are the properties of air?

I Has mass

II Has a taste

III Has colour

IV Odourless

• I and II

• II and III

• III and IV

• I and IV

Multiple Choice

Diagram shows an activity to study the percentage of oxygen in air.

What is observed in this activity?

• Colour of flame

• Production of heat

• Level of water in the gas jar

• Time taken for the candle to burn

Multiple Choice

Why air is classified as a mixture?

• Separated by chemical method

• Density of air is low

• Air particles are difficult to separate

• Separated by undergo fractional distillation process

Multiple Choice

Which gas contributes the largest part of air?

• carbon dioxide

• nitrogen

• sulphur dioxide

• oxygen

Multiple Choice

Which of the following is NOT the composition of air?

• Microorganism

• Argon

• Ammonia

• Nitrogen

Multiple Choice

Which of the component have 21% in the air?

• Oxygen

• Nitrogen

• Carbon dioxide

• Inert gas and others

Multiple Choice

Which of the following statement is TRUE

• Air is an element

• Argon, neon,helium,krypton andxenon are examples of inert gases

• The air does not consist dusts and microorganisms

Multiple Choice

The gas is use for photosynthesis

• Oxygen

• Carbon dioxide

• Nitrogen

• Inert gas

Multiple Choice

The gas is importance for RESPIRATION and COMBUSTION

• Inert gas

• Nitrogen

• Oxygen

• Carbon dioxide

Multiple Choice

The gas is used to fill hot air balloons and weather balloons

• Argon

• Helium

• Neon

Multiple Choice

the gas is used to fill the light bulb

• Helium

• Neon

• Argon

Multiple Choice

To produce nitric acid and ammonia

• Nitrogen

• Neon

• Carbon dioxide

• Oxygen

Multiple Choice

Used in advertisement lighting

• Nirogen

• Neon

• Carbon dioxide

• Oxygen

Multiple Choice

To produce carbonated drinks

• Nitrogen

• Carbon dioxide

• Oxygen

Multiple Choice

For welding and cutting metal

• Nitrogen

• Carbon dioxide

• Oxygen

Multiple Choice

What is the percentage composition of nitrogen in air?

• 78%

• 75%

• 86%

Multiple Choice

What does NOT produce carbon dioxide?

• Photosynthesis
• Burning Fossil Fuels
• Animal respiration
• Plants decaying

Multiple Choice

Combustion is another word for __________.

• Transportation
• Respiration
• Fossil Fuels
• Burning

Multiple Choice

TRUE or FALSE?
All of the carbon in existence is continually recycled in the carbon cycle.

• True
• False

Multiple Choice

Organisms that do not decompose can be buried and become what?

• water
• nutrients
• air
• fossil fuels

Multiple Choice

Carbon can be found in...

• The atmosphere
• Soil
• Fossil fuels
• All of the above

Multiple Choice

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

Multiple Choice

What process occurs when coal (fossil fuel) is used for energy?

• Decomposition
• Combustion
• Pressurization 
• Respiration 

Multiple Choice

What is the process of plants taking in carbon dioxide and releasing oxygen called?

• Respiration

• Produce

• Photosynthesis

• Breathing

Multiple Choice

A gas produced by animals during respiration that plants use for photosynthesis.

• Oxygen

• Toots

• Carbon dioxide

• Water vapor

Multiple Choice

What does an "exchange of gases" mean?

• It means that gases are apart of everything. 
• It means that orange juice is an upside down milkshake with a missing tail.
• It means that humans and plants trade gases back and forth.
• It means that carbon in apart of all living things. 

Multiple Choice

Which type of organism gets its energy directly from the Sun?

• producer
• consumer
• composer
• decomposer

Multiple Choice

Which statement is true about the carbon dioxide-oxygen cycle?

• animals breathe in nitrogen and release oxygen which is used by plants
• animals breathe in oxygen and release carbon dioxide which is used by plants
• animals breathe in nitrogen and release carbon dioxide which is used by plants
• animals breathe in carbon dioxide and release oxygen which is used by plants