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7th Grade Science Comprehensive Test

Total questions: 100

Worksheet time: 1hrs 13mins

Name
Class
Date
1.

Which one of the following does NOT describe weather?

a)

the force of the wind through the trees

b)

if it is raining or not

c)

the amount of water pollution in a lake

d)

the number of clouds there are in the sky

2.
The high temperature today will be near 75 C.
a)
weather
b)
climate
3.
The average winter temperature is 45 C.
a)
weather
b)
climate
4.

What zone is the United States in?

a)

Temperate

b)

Polar

c)

Tropical

5.

What zone is the equator in?

a)

Temperate

b)

Polar

c)

Tropical

6.

Which zone gets the most rainfall?

a)

Polar

b)

Tropical

c)

Temperate

7.

Based on the diagram, which season would the northern hemisphere be experiencing?

a)

Winter

b)

Spring

c)

Summer

d)

Fall

8.

Earth experiences seasons as it revolves around the sun because of its

a)

shape

b)

tilt

c)

speed

d)

mass

9.

The spinning of Earth on its axis is known as

a)

Rotation

b)

Revolution

c)

Orbit

d)

Solstice

10.

The earth orbits around the sun.

a)

Rotation

b)

Revolution

11.

Sunset happens as we begin to turn away from the sun.

a)

Rotation

b)

Revolution

12.
If differences in air pressure produce winds, what can you conclude about temperature and air pressure based on the figure?
a)
As warm air rises, it creates an area of lower pressure, and cooler air flows in as wind
b)
Warm air is denser than cold air is, creating an area of high pressure the produces wind.
c)
Winds flow from areas of low pressure to areas high pressure when temperature is warmer
d)
Air pressure decreases at night because temperature is lower, producing land and sea breezes
13.

What does heat do when convection currents are moving?

a)

Sinks

b)

Rises

c)

Stays in place

14.

What causes convection current in the Earth?

a)

The uneven heating on each layer inside the Earth.

b)

The crusts outer layer.

c)

The temperatures we feel outside.

15.
What causes winds?
a)
differences in precipitation
b)
differences in humidity
c)
differences in air pressure
16.

A Sea Breeze occurs during the

a)

night.

b)

day.

c)

night and day.

d)

alien encounter.

17.

The arrow above the water is coming down and is blue because

a)

the water is warm so it warms the air and warm air sinks.

b)

the water is cold so it warms the air and cool air sinks.

c)

the water is cold so it cools the air and cool air sinks.

d)

the water is warm so it warms the air and cool air sinks.

18.

The L pressure area involves warm air moving _____________ and is near the _____________.

a)

down ; land

b)

up ; land

c)

down ; water

d)

up ; water

19.
In convection, COOL air
a)
Rises
b)
Sinks
20.
Warm air is __________ dense than cold air and rises creating convection currents.
a)
more
b)
less
21.

Descending air in a High leads to _______ weather and ascending air in a Low tends to make weather _________.

a)

fair, stormy

b)

stormy, fair

c)

fair, fair

d)

stormy, stormy

22.
Which global winds have the greatest impact on the weather in the US?
a)
trade winds
b)
prevailing westerlies
c)
doldrums
d)
polar easterlies
23.

Warm rising air causes___________ pressure, resulting in ___________.

a)

high, rain

b)

high, clear skies

c)

low, rain

d)

low, clear skies

24.

Cool sinking air causes___________ pressure, resulting in ___________.

a)

high, rain

b)

high, clear skies

c)

low, rain

d)

low, clear skies

25.

Winds always blow from areas of _________ pressure to areas of _________ pressure.

a)

high, high

b)

low, low

c)

high, low

d)

low, high

26.
The black arrows on the picture represents the:
a)
Westerlies
b)
Trade winds
c)
Polar Easterlies
27.

Objects in the NORTHERN Hemisphere deflect to which direction due to the Coriolis Effect?

a)

Left

b)

Up

c)

Down

d)

Right

28.

Narrow bands of strong winds that blow near the top of the troposphere are referred to as what?

a)

Jet Streams

b)

Cirrus Clouds

c)

Easterlies

d)

Sea Breeze

29.

The Coriolis effect causes ___________.

a)

the Earth to rotate on its axis

b)

earthquakes

c)

global winds to move in a curved path instead of a straight line

d)

the Earth to revolve around the sun

30.

The Coriolis Effect is caused by what?

a)

The wind blowing

b)

Earth's gravity pulling things down

c)

The rotation of the Earth

d)

The pull of the Moon

31.

Air masses have properties from where they...

a)

were formed

b)

end up

32.

Where do MARITIME air masses form?

a)

Over water

b)

Over land

33.

Which type of air mass brings WARM and DRY weather?

a)

Maritime Polar (mP)

b)

Maritime Tropical (mT)

c)

Continental Polar (cP)

d)

Continental Tropical (cT)

34.

Which type of air mass bring COLD and WET weather?

a)

Maritime Polar (mP)

b)

Maritime Tropical (mT)

c)

Continental Polar (cP)

d)

Continental Tropical (cT)

35.

Name that front.

a)

Cold Front

b)

Warm Front

c)

Stationary Front

d)

Occluded Front

36.

Brings some clouds and gentle rains.

a)

Cold Front

b)

Warm Front

c)

Stationary Front

d)

Occluded Front

37.
If an air mass is rising, it must be
a)
cold and less dense
b)
cold and more dense
c)
warm and more dense
d)
warm and less dense
38.

What type of weather will you see along a cold front?

a)

Thunderstorms

b)

Sunny skies

c)

Gentle rain

d)

No weather

39.
Warm ocean currents generally come from
a)
The North Pole
b)
The South Pole
c)
The Equator
d)
Both A and B
40.
Deep Ocean currents are a result of
a)
Global Wind Patterns
b)
Earth's Rotation
c)
Density
d)
All of the above
41.

______ causes surface currents.

a)

The Coriolis Effect

b)

gravity

c)

density differences

d)

wind

42.

The __________ is a surface current that flows along the eastern US and brings warm water to Europe.

a)

California Current

b)

Gulf Current

c)

North American Gyre

d)

Arctic Current

43.

What are the perfect atmospheric conditions for a tornado?

a)

When a cold/dry air mass and a warm/moist air mass meet in addition to falling pressure & variable winds.

b)

When a cold/moist air mass and a warm/dry air mass meet in addition to falling pressure & variable winds.

c)

When a cold/dry air mass and a warm/moist air mass meet in addition to rising pressure & steady winds.

d)

When a cold/moist air mass and a warm/moist air mass meet in addition to rising pressure & variable winds.

44.

What speed must the winds be in order for a tropical storm to be a hurricane?

a)

74 mph

b)

119 mph

c)

47 mph

d)

39 mph

45.

Do the center of hurricanes have high or low pressure?

a)

high

b)

low

46.

Which direction do hurricanes turn in the Northern Hemisphere?

a)

clockwise

b)

counterclockwise

47.

How does elevation affect the climate of an area?

a)

As elevation increases, air temperature increases.

b)

As elevation increases, air temperature decreases.

c)

As elevation increases, precipitation increases.

d)

As elevation increases, precipitation decreases.

48.

What are four factors that affect climate?

a)

latitude

b)

proximity (closeness) to large body of water

c)

earthquakes

d)

ocean currents

e)

elevation

49.

Which heats up faster?

a)

Land

b)

Water

50.

Climates are warmer near the _____________ and colder near the _____________.

a)

Equator, The Poles

b)

The Poles, Equator

51.

When water vapor is cooled and forms droplets of liquid water

a)

Condensation

b)

Evaporation

c)

Transpiration

d)

Runoff

52.

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

a)

precipitation

b)

evaporation

c)

transpiration

d)

condensation

53.

What step of the water cycle does this picture show?

a)

Condensation

b)

Runoff

c)

Precipitation

d)

Evaporation

54.
How animals get the nitrogen they need
a)
from the air they breathe
b)
from the water they drink
c)
from the food they eat
d)
from the Sun
55.
Nitrogen rich fertilizers and manure can cause water pollution.
a)
True
b)
False
56.
How nitrogen is "fixed" into useable form for plants
a)
only through action of bacteria
b)
only through lightning
c)
through action of bacteria & lightning
d)
through photosynthesis
57.
Which statement is true about the carbon dioxide-oxygen cycle?
a)
animals breathe in nitrogen and release oxygen which is used by plants
b)
animals breathe in oxygen and release carbon dioxide which is used by plants
c)
animals breathe in nitrogen and release carbon dioxide which is used by plants
d)
animals breathe in carbon dioxide and release oxygen which is used by plants
58.
Animals and plants use substances that cycle through the environment.  Which substance is needed by plants to survive and is released into the environment by animals?
a)
oxygen
b)
sugar
c)
salt
d)
carbon dioxide
59.
All of the carbon in existence is continually recycled in the carbon cycle
a)
True
b)
False
60.
Burning fossil fuel has which effect in the carbon cycle?
a)
It removes carbon dioxide from the atmosphere.
b)
It puts carbon dioxide under the ground.
c)
It adds carbon dioxide to the atmosphere.
d)
It has no effect in the carbon cycle.
61.
Which of the following add carbon dioxide to the atmosphere?
a)
volcanoes
b)
combustion of fossil fuels
c)
animal and plant respiration
d)
all of these
62.

What are the products of cellular respiration? Choose 3.

a)

water

b)

ATP

c)

Oxygen

d)

Sunlight

e)

Carbon Dioxide

63.
The warming of the atmosphere by the trapping of heat being radiated to space is called
a)
evaporation
b)
condensation
c)
the greenhouse effect
d)
radiation
64.

What types of data have scientists collected related to climate change?

a)

Measuring Earth’s current temperature and CO2

b)

Examining ice/glacier melting

c)

Taking educated guesses

d)

The ice caps are getting bigger/growing

65.

97% of scientists believe what is causing climate change?

a)

Animals and Plants

b)

Eco-Friendly Cars

c)

Humans

d)

Conservation of energy

66.

What are some potential consequences of climate change?

a)

The sea levels will rise putting seaside towns and cities at risk of drowning

b)

The sea levels will drop putting seaside towns and cities at risk of drowning

c)

More extreme weather

d)

Animals will be able to adapt to the changes

67.

What are some possible solutions to climate change

a)

Use less energy

b)

Choose renewable energy sources

c)

Plant trees and other plants

d)

Recycle and reuse items

68.

The graph shows changes in carbon dioxide

(CO2) concentrations and surface temperatures

on Earth from the years 1880 to 2000.

Why do carbon dioxide concentrations and

surface temperatures show the relationship seen

in the graph?

a)

because lower carbon dioxide levels mean more

heat is retained in Earth's atmosphere

b)

because higher carbon dioxide levels mean

more heat is retained in Earth's atmosphere

c)

because lower carbon dioxide levels mean less

heat is retained in Earth's atmosphere

d)

because higher carbon dioxide levels mean less

heat is retained in Earth's atmosphere

69.

The smallest particle of an element.

a)

Element

b)

Molecule

c)

Atom

70.

A substance that cannot be broken down into other substances by chemical or physical means.

a)

Covalent bond

b)

Atom

c)

Element

71.
Which subatomic particle has a positive (+) charge?
a)
Neutron
b)
Proton
c)
Electron
72.
Which subatomic particle has a neutral or no charge?
a)
Proton
b)
Electron
c)
Neutron
73.

This model added on to previous models by showing electrons existed at certain "energy levels". It is often called the Planetary Model.

a)
The "Bohr Model" of the atom
b)
The "Rutherford Model" of the atom
c)
The "Plumb Pudding Model" of the atom
d)
The "Quantum Mechanical Model" of the atom
74.

Dalton's model of the atom is represented by which letter?

a)

A

b)

B

c)

C

d)

D

e)

E

75.

What are the three main groups of the periodic table?

a)

groups

b)

metal

c)

nonmetals

d)

metalloids

e)

periods

76.

What are the vertical columns on the periodic called?

a)

groups

b)

periods

c)

nonmetals

d)

metals

e)

metalloids

77.

What do the vertical columns on the periodic table tell us?

a)

The number of orbitals

b)

The number of valence electrons (electrons on the outer most shell)

78.

What are the horizontal rows on the periodic table called?

a)

periods

b)

groups

c)

metals

d)

nonmetals

e)

metalloids

79.

What do the horizontal rows on the periodic table tell us?

a)

The number of orbitals

b)

The number of valence electrons (the electrons on the outer most shell)

80.

What does the number of proton tell us?

a)

electrons

b)

atomic number

c)

atomic mass

d)

neutrons

81.

How do you calculate the number of neutrons? *

a)

Mass = Atomic number - Neutrons

b)

Mass - Atomic number = Neutrons

c)

Atomic number = Neutrons

82.

When an atom loses an electron, it becomes a

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

83.
Ionic bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
84.
How are ionic bonds formed?
a)
Transfer of electrons
b)
Sharing of electrons
85.
Why do elements bond?
a)
To be friends
b)
To create a new element
c)
To become stable
86.
Atoms that gain electrons become...
a)
negatively charged
b)
positively charged
c)
remain neutrally charged
d)
21
87.
In a covalent bond, one or more electrons are? 
a)
shared 
b)
lost 
c)
gained 
d)
transferred 
88.
Between  nonmetals
a)
Ionic Bonds
b)
Covalent Bonds
c)
Both bonds
d)
Neither bond
89.

How many elements are in this chemical formula?

H2SO4H_2SO_4  

a)

1

b)

2

c)

3

d)

4

90.

Molecules that are made of more than one type of atom are called?

a)

Molecules

b)

Elements

c)

Mixtures

d)

Compounds

91.
How many total atoms are in the compound C2H8O ?
a)
11
b)
2
c)
8
d)
1
92.
Balance the following equation:
__N2  +  __H2  -->  __NH3
a)
N2  +  3H2  --> 2NH3
b)
2N2  +  3H2  --> NH3
c)
3N2  +  2H2  --> 2NH3
d)
N2  +  H2  --> NH3
93.
Which  of the following is a balanced equation?
a)
Na   +   Cl2   -->  NaCl
b)
H2  +  O2  --> H2O
c)
Ca   +   Br  -->  CaBr2
d)
Na   +  F  -->  NaF
94.
Which of the following describes the law of conservation of mass?
a)
In a reaction, atoms are created or destroyed.
b)
In a reaction, atoms are not lost or made.
c)
In a reaction, the mass of the product may be more or less than the reactants.
d)
In a reaction, mass never stays the same.
95.
What is the reactant in the following equation?
2NaHCO3  -> Na2CO3  +  CO2  + H2O
a)
NaHCO3
b)
Na2CO3
c)
CO2
d)
H2O
96.

Which type of reaction is:

H2 + O2 → H2O

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

97.

Which type of reaction is:

NiCl2 → Ni + Cl2

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

98.
What does Boyle's law relate to?
a)
Temperature and Volume
b)
Volume and Pressure
c)
Temperature and Pressure
99.
When the temperature of matter increases the particles...
a)
speed up and move closer
b)
speed up and move farther apart
c)
slow down and move closer together
d)
slow down and move farther apart
100.
When Pressure increases then the Volume must...
a)
Increase
b)
decrease

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