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Science Exam review

Total questions: 135

Worksheet time: 3hrs 31mins

Name
Class
Date
1.
Which of these problems can be caused by air pollution?
a)
Respiratory problems
b)
Reduced food sources for humans
c)
Increased disease for humans
d)
Decrease in global temperatures
2.
What causes acid rain?
a)
High concentrations of sulfuric or nitric acid from pollution
b)
Fertilizer use
c)
Pesticide use
d)
CFCs
3.
Acid rain can damage
a)
Drinking water sources
b)
Aquatic life
c)
Architecture/buildings
d)
All options are correct
4.
The ozone layer protects us from
a)
UV rays
b)
CFCs
c)
Increased atmospheric heat
d)
Decreased atmospheric heat
5.
The ozone layer is damaged by
a)
CFCs
b)
Increase in greenhouse gases
c)
Increased global temperatures
d)
Sulfuric and nitric acids
6.
Global warming is due to 
a)
Greenhouse gases
b)
Nitric and sulfuric acids
c)
CFCs
d)
Ozone depletion
7.
Greenhouses gases
a)
Absorb and radiate heat
b)
Destroy the ozone layer
c)
Cause respiratory problems
d)
Create smog
8.
Which of the following are greenhouse gases?
a)
Carbon dioxide
b)
Methane
c)
Water vapor
d)
All answers are correct
9.
Greenhouse gases, in moderate amounts, keep the Earth's temperature stable
a)
True
b)
False
10.
Increase in which gas is primarily responsible for increased global warming?
a)
Carbon dioxide
b)
Water vapor
c)
Methane
d)
Nitric oxides
11.
The ____________________ protects people from the effects of too much ultraviolet radiation.
a)
ozone layer
b)
smog layer
c)
cloud cover
d)
temperature inversion
12.
A colorless, odorless gas
a)
Nitrogen oxides
b)
Ground-level ozone
c)
Carbon monoxide
d)
Sulfur dioxide
13.
A metallic element that can cause brain damage
a)
Lead
b)
Particulate matter
c)
Ground-level ozone
d)
Nitrogen oxides
14.
Dust, ash and pollen are examples of this air pollutant
a)
Lead
b)
Ground-level ozone
c)
Particulate matter
d)
Nitrogen oxides
15.
Combines with other pollutants to form acid rain
a)
Nitrogen oxides & sulfur dioxide
b)
Particulate matter & lead
c)
Nitrogen oxides & ground-level ozone
d)
Sulfur dioxide & ground-level ozone
16.
Can cause burning of the skin
a)
Lead
b)
Particle matter
c)
Sulfur dioxide
d)
Nitrogen oxides
17.
jaya cuts down trees to make billions of toothpicks. Jaya doesn't use toothpicks, she flosses. What is she destroying?
a)
land pollution
b)
conservation
c)
natural resources
18.
Which of the following is an example of a primary pollutant?
a)
Acid rain
b)
Sick building syndrome
c)
Carbon monoxide
d)
Asbestos
19.
Pollution hanging over urban areas that causes reduced visibility is called
a)
Air pollution
b)
Temperature inversion
c)
Light pollution
d)
Smog
20.
Sound that affects the quality and/or health of human life
a)
Light pollution
b)
Air pollution
c)
Noise pollution
d)
Acid shock
21.
Which pie chart correctly shows the percentages of elements in the air?
a)
a
b)
b
c)
c
d)
d
22.
Which statement most accurately describes the temperature trend in the Troposphere? Temperatures...
a)

rise with increasing altitude above the Earth

b)

rise then fall with increasing altitude above the Earth

c)

decrease with increasing altitude above the Earth

d)

remain constant with increasing altitude above the Earth

23.
Where you will find the ozone layer.
a)
stratosphere
b)
thermosphere
c)
exosphere
d)
mesosphere
24.
Where weather occurs.
a)
stratosphere
b)
thermosphere
c)
troposphere
d)
mesosphere
25.
Where we live.
a)
stratosphere
b)
thermosphere
c)
troposphere
d)
mesosphere
26.
The hottest layer.
a)
troposphere
b)
thermosphere
c)
exosphere
d)
mesosphere
27.
What two gases are found throughout all layers of the atmosphere?
a)
Nitrogen and carbon dioxide
b)
Nitrogen and oxygen
c)
Oxygen and carbon dioxide
d)
Trace gases and water vapor
28.
What does the earth's atmosphere do?
a)
help to regulate the temperature on Earth
b)
Help UV rays to reach the Earth's surface
c)
Creates meteors in the sky
d)
Keep ocean waters cold
29.
As you go higher in the troposphere, the temperature _______________.
a)
decreases
b)
increases
c)
stays the same
d)
gets very hot
30.
What is the function of the ozone layer?
a)
to allow UV rays to get to Earth
b)
to block UV rays from getting to Earth
c)
To keep oxygen in
d)
to allow meteors to get to Earth
31.
This is the layer where most commercial jet airliners fly.
a)
Troposphere
b)
Stratosphere
c)
Mesosphere
d)
Thermosphere
32.
The higher you go, the air becomes _____ _____.
a)
More dense
b)
Less dense 
33.
This is the layer where meteors, or shooting stars, burn up.
a)
Troposphere
b)
Stratosphere
c)
Mesosphere
d)
Thermosphere
34.
What happens to the density (thickness)/air pressure of the air as you increase in altitude?
a)
density increases
b)
density decreases
c)
density stays the same
d)
density disappears
35.
In which layer of the atmosphere would you find the top of Mount Everest?
a)
Troposphere
b)
Stratosphere
c)
Mesosphere
d)
Thermosphere
36.

The air is made up of several types of gases that all have their specific uses.

a)

True

b)

False

37.

A fire requires fuel , heat and _____________ to stay active.

a)

carbon dioxide

b)

oxygen

c)

helium

d)

nitrogen

38.

Which best describes the use of air in the image ?

a)

to surf

b)

to swim

c)

to move things

d)

to keep things afloat

39.

Select all the objects that need air to operate .

a)
b)
c)
d)
e)
40.

Which of the following gases of the air , would be the most appropriate to put out or control that fire?

a)

carbon dioxide

b)

oxygen

c)

nitrogen

d)

hydrogen

41.

Which of the following is compressed or pressurized air used in ?

a)
b)
c)
d)
e)
42.

Birds , bats and insects are able to fly without air.

a)

true

b)

false

43.

Animals use __________ from the air to release energy from foods they eat.

a)

carbon dioxide

b)

nitrogen

c)

helium

d)

oxygen

44.

Air allows to :

Select all that applies

a)

hear

b)

smell

c)

eat

d)

feel

45.

The water cycle needs air in order to work.

a)

true

b)

false

46.

All plants need ___________________ from the air, in order to make food and survive.

a)

nutrients

b)

sunlight

c)

carbon dioxide

d)

oxygen

47.

Which machine needs air to function ?

a)
b)
c)
48.

Which flame will go out first ?

a)

The one under the bigger jar.

b)

The one under the smaller jar

c)

None

49.

An airplane needs oxygen to fly.

a)

true

b)

false

50.

Why do you think the candle under the jar has gone out ?

a)

Too much heat is in the jar

b)

Too much carbon dioxide is in the jar

c)

The fire is starved of oxygen

d)

The jar is too transparent.

51.

What is the number given to the public that describes how many particles are in the air called?

a)

Air Quality Rating

b)

Air Quality Description

c)

Air Quality Index

d)

Air Quality Number

52.

A maroon/brown color on the AQI scale represents what type of air?

a)

Healthy

b)

Unhealthy for sensitive groups

c)

Unhealthy

d)

Hazardous

53.

The toxic pollutant that is most likely in the air causing pollution is called what?

a)

Sulfur Dioxide

b)

Nitrogen Dioxide

c)

Particulate Matter

d)

Ozone

54.

What can cause the air quality index from a certain area to increase?

a)

Night

b)

Rush hour

c)

Rain

d)

Renewable Energy

55.

ACID will change blue litmus paper to

a)

red

b)

blue

c)

yellow

d)

green

56.

ALKALINE will change red litmus paper to

a)

red

b)

blue

c)

yellow

d)

green

57.

The taste of ALKALINE is

a)

sour

b)

bitter

c)

no taste

d)

sweet

58.

The taste of ACID is

a)

sour

b)

bitter

c)

no taste

d)

sweet

59.

Pineapple is

a)

Acid

b)

Alkaline

c)

Neutral

60.

Lemon is

a)

Acid

b)

Alkaline

c)

Neutral

61.

Salt is

a)

Acid

b)

Alkaline

c)

Neutral

62.

Sugar is

a)

Acid

b)

Alkaline

c)

Neutral

63.

Orange is

a)

Acid

b)

Alkaline

c)

Neutral

64.

Shampoo is

a)

Acid

b)

Alkaline

c)

Neutral

65.

Toothpaste is

a)

Acid

b)

Alkaline

c)

Neutral

66.

Bitter gourd is

a)

Acid

b)

Alkaline

c)

Neutral

67.

Vinegar is

a)

Acid

b)

Alkaline

c)

Neutral

68.

As a part of the water cycle, water from Earth's surface enters the clouds and finally falls back to the ground in the form of rain. What is the correct sequence of processes water undergoes?

a)

Evaporation, Condensation, Precipitation

b)

Precipitation, Condensation, Evaporation

c)

Condensation, Evaporation, Precipitation

d)

Evaporation, Precipitation, Condensation

69.

The image shows various stages in the water cycle. During which stage does water flow back towards the sea as runoff?

a)

W

b)

X

c)

Y

d)

Z

70.

What is precipitation?

a)

Sweat from our bodies on hot days

b)

Warm rain but not cold snow or sleet

c)

Gas that we use in furnaces or ovens

d)

Any form of water that falls from the sky

71.

Condensation occurs when water vapor_____________.

a)

heats up and becomes liquid water

b)

cools off and becomes liquid water

c)

freezes and becomes ice

d)

rains on the land

72.

The process when plants release water vapor from their leaves is called _____________.

a)

precipitation

b)

evaporation

c)

transpiration

d)

condensation

73.
What step of the water cycle occurs when clouds become too heavy? 
a)
Condensation
b)
Runoff
c)
Precipitation
d)
Evaporation
74.
What is the process during which water cools and turns from a gas to a liquid?
a)
Condensation
b)
Runoff
c)
Precipitation
d)
Evaporation
75.

What step of the water cycle does this picture show?

a)

Condensation

b)

Runoff

c)

Precipitation

d)

Evaporation

76.

Which best explains why runoff is important?

a)

It returns water to other locations on Earth

b)

It increases the chance of flooding

c)

It makes evaporation occur faster

d)

It increases condensation

77.
The water cycle has
a)
a beginning and an end. 
b)
no beginning an no end. 
c)
only a beginning. 
d)
only an end. 
78.
What source of energy evaporates the most water from Earth’s surface?
a)
volcanoes
b)
the sun
c)
lightning
d)
wind
79.

When water changes from a liquid to a solid it is known as...

a)

melting.

b)

condensation.

c)

freezing.

d)

evaporation.

80.

In which area would the rate of evaporation be the lowest?

a)

Over the ocean

b)

Over the mountains

c)

Over the rainforest

d)

Over the desert

81.

An underground layer of sand, gravel or rock that stores and carries water

a)

water table

b)

water cycle

c)

aquifer

d)

Infiltration

82.

Turns frozen water into water vapors - skipping the melting stage

a)

Sublimation

b)

Percolation

c)

Transpiration

d)

Evaporation

83.

Water running off the land surface

a)

Evaporation

b)

Sublimation

c)

Transpiration

d)

Run-off

84.

When clouds get too heavy and water falls back to earth in the form of rain, snow, hail or other forms.

a)

Precipitation

b)

Evaporation

c)

Percolation

d)

Transpiration

85.

What are formed when water vapor condenses and come together?

a)

Clouds

b)

Mountains

c)

Transpiration

d)

Valleys

86.

What is wastewater?

a)

Clean water

b)

Dirty water

c)

Used water

d)

Used or dirty water

87.

Which of the following is not a disease caused by drinking unclean water?

a)

Cholera

b)

Typhoid

c)

Dysentery

d)

Erysipelas

88.

__________ is solid matter that settles at the bottom in the settling tank

a)

Sludge

b)

Sewage

c)

Biological

d)

Contaminants

89.

Sewage consist mainly of water

a)

True

b)

False

90.

Last step in wastewater treatment is a ___________ process

a)

Chemical

b)

Mechanical

c)

Biological

d)

Physical

91.

What happen if drainage is not properly dispose off-sewage?

a)

We will not get clean water

b)

Diseases will spread

c)

Water will get polluted

d)

All the above

92.

symbol of sodium

a)

k

b)

Fe

c)

Na

d)

Ag

93.
A copper penny turning greenish after a few years is an example of ...
a)
Chemical Change
b)
Physical Change
94.
An explosion occurs ...
a)
Chemical Change
b)
Physical Change
95.
Is digesting your food a physical or chemical change?
a)
Physical
b)
Chemical
96.
Is a car using fuel a physical or chemical change?
a)
Physical
b)
Chemical
97.
The diagram below shows changes happening to water in a specially shaped bottle.
What changes did the water undergo?
a)
melting and then freezing
b)
freezing and then evaporation
c)
condensation and then melting
d)
evaporation and then condensation
98.

Identify what type of change happening in the picture below...

a)

Chemical Reaction

b)

Physical Change

c)

Change in State

d)

Change in appearance only

99.

Which of the following is a molecule?

a)

copper

b)

ferrum

c)

oxygen we inhale

d)

none of these

100.

The atomicity of water is

(a)  

101.

Which of the following is correct representation of carbon monoxide?

a)

Co

b)

cO

c)

none of these

d)

CO

102.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
103.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
104.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
105.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
106.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
107.
Is this substance acidic, basic, or neutral?
a)
Acidic
b)
Basic
c)
Neutral
108.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
109.
This substance releases OH- into solution
a)
Acid
b)
Base
c)
Neutral
110.
Ca(OH)2 is an example of a(n)
a)
Acid
b)
Base
c)
Neutral
111.
HBr is an example of a(n)
a)
Acid
b)
Base
c)
Neutral
112.
HNO3 is an example of a(n)
a)
Acid
b)
Base
c)
Neutral
113.
What might happen if you mixed a strong acid with an equally strong base?
a)
You would see an explosive chemical reaction.
b)
The acid would destroy the base.
c)
The base would destroy the acid.
d)
You'd wind up with a pH-neutral substance.
114.
What is a property of bases?
a)
Slippery touch
b)
Sour taste
c)
Ability to dissolve metal
d)
Ability to form hydronium ions
115.
pH stands for:
a)
Potency of hydrogen
b)
Plurality of hydrogen
c)
Potential of hydrogen
d)
Pleurisy of hydrogen
116.
A neutralization reaction will always produce...
a)
water & salt
b)
water
c)
salt
d)
water & carbon
117.
What are the products of the following reaction?
H2SO4  +  KOH  -->  
a)
HK  +  HSO4
b)
H2O  +  KSO4
c)
H2O  +  K2SO4
d)
H2  +  K2SO4
118.
Complete the following reaction:
Hydrochloric acid + magnesium hydroxide --> 
a)
Magnesium chloride + water 
b)
Magnesium + water
c)
Magnesium chloride + hydrogen gas 
d)
Magnesium chloride + water + carbon dioxide 
119.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
120.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
121.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
122.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
123.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
124.
Is this substance acidic, basic, or neutral?
a)
Acidic
b)
Basic
c)
Neutral
125.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
126.
This substance releases OH- into solution
a)
Acid
b)
Base
c)
Neutral
127.
Ca(OH)2 is an example of a(n)
a)
Acid
b)
Base
c)
Neutral
128.
HBr is an example of a(n)
a)
Acid
b)
Base
c)
Neutral
129.
HNO3 is an example of a(n)
a)
Acid
b)
Base
c)
Neutral
130.
What might happen if you mixed a strong acid with an equally strong base?
a)
You would see an explosive chemical reaction.
b)
The acid would destroy the base.
c)
The base would destroy the acid.
d)
You'd wind up with a pH-neutral substance.
131.
What is a property of bases?
a)
Slippery touch
b)
Sour taste
c)
Ability to dissolve metal
d)
Ability to form hydronium ions
132.
pH stands for:
a)
Potency of hydrogen
b)
Plurality of hydrogen
c)
Potential of hydrogen
d)
Pleurisy of hydrogen
133.
A neutralization reaction will always produce...
a)
water & salt
b)
water
c)
salt
d)
water & carbon
134.
What are the products of the following reaction?
H2SO4  +  KOH  -->  
a)
HK  +  HSO4
b)
H2O  +  KSO4
c)
H2O  +  K2SO4
d)
H2  +  K2SO4
135.
Complete the following reaction:
Hydrochloric acid + magnesium hydroxide --> 
a)
Magnesium chloride + water 
b)
Magnesium + water
c)
Magnesium chloride + hydrogen gas 
d)
Magnesium chloride + water + carbon dioxide 

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