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Worksheets8th Grade Science Midterm Review
Total questions: 112
Worksheet time: 1hrs 26mins
Name
Class
Date
1.
Collecting data is not an essential part of scientific inquiry.
a)
True
b)
False
2.
To analayze
a)
to look closely
b)
to aviod
c)
to estimate
3.
A prediction is
a)
never necessary
b)
a fact
c)
a guess
4.
An educated guess that can be tested is
a)
a hyposthesis
b)
speculation
c)
theory
5.
To infer you use
a)
opinions of others
b)
a dice roll
c)
prior knowledge
6.
You use your five sense to find out about the world around you. This is called______.
a)
observations
b)
data
c)
conclusion
d)
scientific method
7.
You are doing an experiment recording the growth of plants under different amounts of sunlight. What is the dependent variable?
a)
The sunlight
b)
The growth
c)
The experiment
d)
The amounts of photons
8.
The variable that causes a change is the
a)
constant
b)
independent variable
c)
dependent variable
d)
control
9.
The variable that is the result of the experiment is the
a)
constant
b)
independent variable
c)
dependent variable
d)
control
10.
A variable that never changes is known as a
a)
constant
b)
independent variable
c)
dependent variable
d)
control
11.
"Will ice melt faster in salt water?", is an example of a
a)
Hypothesis
b)
Question
c)
Dependent variable
d)
Control
12.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
a)
The type of plant
b)
The amount of sunlight
c)
The type of music
d)
The type of liquid
13.
A student wants to test the effects of type of exercise on heart rate. What is the dependent variable?
a)
heart rate
b)
type of exercise
c)
amount of exercise
d)
time of day exercise occurs
14.
How many manipulated variables does an experiment have?
a)
0
b)
1
c)
between 1 and 5
d)
as many as needed
15.
The summary at the end of an experiment that explains the results.
a)
conclusion
b)
procedures
c)
materials
d)
responding variable
16.
A list of the steps anyone could follow to conduct an experiment.
a)
obervations
b)
question/problem
c)
materials
d)
procedures
17.
Which is NOT a step in the scientific method?
a)
Make observation
b)
Form a theory
c)
Collect data
d)
Form a hypothesis
18.
An ________ eats both plants and animals.
a)
carnivore
b)
omnivore
c)
herbivore
d)
producer
19.
A ____________ breaks down waste or dead organisms and recycles nutrients.
a)
consumer
b)
producer
c)
decomposer
d)
omnivore
20.
An animal that hunts for its food
a)
prey
b)
predator
c)
producer
d)
decomposer
21.
An animal that is hunted for food.
a)
predator
b)
prey
c)
consumer
d)
decomposer
22.
Shows how energy flows from one organism to another.
a)
food cycle
b)
prey chain
c)
food chain
d)
predator cycle
23.
An organism that makes its own food for energy
a)
consumer
b)
predator
c)
prey
d)
producer
24.
This drawing shows a forest ecosystem. Which of the animals is an herbivore?
a)
fox
b)
frog
c)
deer
d)
ducks
25.
What is the role of a tree in a food chain?
a)
It breaks down wastes and dead organisms
b)
It uses the sun's energy to make food.
c)
It eats other organisms.
d)
It cannot make its own food.
26.
Which is the best description of an ecosystem?
a)
all of the living and nonliving things in an area
b)
all of the individuals of one species in an are
c)
all of the populations of living things in an area
d)
all of the abiotic factors in an area
27.
Symbiosis. Which two living things interact in a way that is a Win-Win?
a)
fleas and a dog
b)
flowers and bees
c)
a hawk and a mouse
d)
a person and mosquitos
28.
What is the name for all the animals of the same species living in an ecosystem?
a)
Population
b)
Community
29.
What connects many
food chains?
food chains?
a)
non-renewable resouce
b)
food web
c)
primary consumer
d)
renewable resource
30.
What is Homeostasis?
a)
when the supply of food is balanced
b)
the study of the relationship between
organisms and their environment
organisms and their environment
c)
food chain
31.
Choose the complete and logical food chain.
a)
sun-plant-rabbit- eagle
b)
deer - squirrel- plant-sun
c)
sun -deer-plant- eagle
d)
eagle- squirrel-rabbit- plant- eagle
32.
Cutting down trees will ...
a)
have very little effect on the living things in the ecosytem
b)
affect most of the plants and animals in the ecosystem
c)
only affect animals that live in the trees of the ecosystem
d)
only affect animals that live in ecosystem
33.
Choose the list that BEST describes what plants and animals need to survive.
a)
soil, water, sunlight, food, air
b)
air, water, sunlight, and a source of food for energy
c)
food, air, oxygen, space, and water
d)
environment, habitat, space and sunlight
34.
Which of these relationships is harmful?
a)
crocodile and plover bird
b)
Two scavenger birds fighting to eat a dead animal
c)
A flea on a dog
d)
A ladybug eating aphids on a plant
35.
Which of the following provides organisms in an ecosystem with ALL of their basic needs to survive?
a)
habitat
b)
soil
c)
producers
d)
air
36.
A squirrel makes its habitat in a forest. A company purchases the land and cuts down the trees. What would happen?
a)
The squirrel population would continue to increase
b)
The squirrel would adapt to living there
c)
The squirrel population would decrease
d)
The tree population would increase
37.
Why are advantageous traits more likely to be passed onto offspring?
a)
Because they are more likely to survive and reproduce.
b)
Because they look cooler.
c)
Because they come from recessive alleles.
d)
Because the trait is an acquired phenotype.
38.
Evolution means...
a)
Change over time in a population.
b)
That everything is the same.
c)
That organisms never change.
d)
Negative traits are acquired in populations.
39.
What is it called when better adapted organisms survive to pass traits along to their offspring.
a)
Evolution
b)
Natural Selection
c)
Extinction
d)
Artifical Selection
40.
Some lizards have different size legs. Lizards with longer legs are able to better access food. Over time, lizards with short legs became less common.
What is the successful adaptation?
What is the successful adaptation?
a)
Lizards
b)
Long legs
c)
Food
d)
Leg sizes
41.
Organisms that survive will pass their ______________ onto their offspring
a)
diseases
b)
traits
c)
knowledge
d)
kit kats
42.
organisms within a species ______________ for food, water, space and mates.
a)
look
b)
compete
c)
locate
d)
leave an area
43.
When every organism of a species has died.
a)
Evolution
b)
Natural Selection
c)
Extinction
d)
Artificial Selection
44.
You look at two species and see very similar DNA. What does this likely tell you?
a)
These are the same animal.
b)
These animals have a common ancestor.
c)
These animals are not likely related.
d)
These animals are likely becoming one species.
45.
The 3rd stage in the life cycle of our Sun is...
a)
protostar
b)
medium-sized yellow
c)
red giant
d)
white dwarf
46.
_________ fuses into _________ to make the energy of a star.
a)
Helium, Hydrogen
b)
Carbon Dioxide, Methane
c)
Hydrogen, Methane
d)
Hydrogen, Helium
47.
Absolute Magnitude is how bright a star ...
a)
seems like from the Earth
b)
actually is when all the stars are at the same distance
c)
actually is when all the stars are in the same picture
d)
seems to be if we took a picture
48.
How fast does light travel in 1 sec.?
a)
100,000 miles
b)
135,000 miles
c)
186,000 miles
d)
6 trillion miles
49.
Which of the following is the coolest star
a)
red giant superstar
b)
small, white dwarf star
c)
main sequence yellow star
d)
main sequence blue star
50.
What does a stars color indicate?
a)
color
b)
age
c)
size
d)
temperature
51.
Which is the largest?
a)
Moons
b)
Asteroids
c)
Universe
d)
Star
52.
What color star is the sun?
a)
White
b)
Yellow
c)
Red
d)
Orange
53.
A gigantic explosion that cause the death of a massive star is
a)
Nebula
b)
light year
c)
Comet
d)
Supernova
54.
Giant clouds of gas and dust. Stars can be born and die here.
a)
light year
b)
Nebula
c)
Cometr
d)
Asteroid
55.
A force of attraction between any two objects is called _____________.
a)
static electricity
b)
rotation
c)
gravity
d)
orbit
56.
A Red giant comes from a low mass star?
a)
True
b)
False
57.
What is the name of the scientific theory that created everything in the universe?
a)
Nebula
b)
Big Bang
c)
Black hole
58.
What type of galaxy is this?
a)
Spiral
b)
Elliptical
c)
Irregular
d)
Irrational
59.
Which star has the lowest luminosity?
a)
A
b)
B
c)
C
d)
D
60.
Which star has the lowest temperature?
a)
A
b)
B
c)
C
d)
D
61.
What type of galaxy is this?
a)
Spiral
b)
Elliptical
c)
Irregular
d)
Irrational
62.
Is the sun a star?
a)
yes
b)
no
63.
What do all stars start out as?
a)
A Planetary Nebula
b)
A Supernova
c)
A Stellar Nebula
64.
The hottest color star is
a)
Blue
b)
White
c)
Yellow
d)
Red
65.
What is important to understand when trying to determine when different objects in the universe will collide with the planets Venus and Mars?
a)
how the object was formed
b)
Mars and Venus atmospheric composition
c)
there is a gravitational attraction between all objects
d)
how magnets are attracted to one another
66.
Which of the following best explains the curvature of the arrows for the westerlies and the trade winds?
a)
The ocean currents create winds flowing in a similar direction to the current.
b)
The Coriolis effect causes the winds to curve that way because the Earth rotates from left to right.
c)
The Coriolis effect causes the winds to curve that way because the Earth rotates from right to left.
d)
The sun is shining and warming the air from the right side of this diagram.
67.
A jet stream is a wide band of low-speed winds that flow in the middle of the atmosphere.
a)
True
b)
False
68.
The curving of the path of a moving object as a result of Earth's rotation is called the Coriolis effect.
a)
True
b)
False
69.
A convection current is any movement of matter that results from differences in density.
a)
True
b)
False
70.
The stratosphere is the top layer of the atmospehre
a)
True
b)
False
71.
Which of the following is most responsible for the moving bands of air around Earth that are shown in the picture above?
a)
Conduction
b)
Convection
c)
Coriolis effect
d)
greenhouse effect
72.
Which of the following is the direct source for these winds and currents?
a)
the uneven heating of Earth by the sun
b)
the Coriolis effect
c)
the rotation of Earth
d)
the sun is shining and warming the air from the right side of the diagram
73.
The Coriolis effect greatly affects the paths of air circulation on Earth. What causes the Coriolis effect?
a)
the sun
b)
the moon
c)
Earth's rotation
d)
Earth's revolution
74.
Which of the following describes the general pattern of winds near the equator?
a)
Winds are generally weak because the equator is a region where low and high air pressure atmospheric bands come together.
b)
Winds are generally strong because the equator is a region where low and high air pressure atmospheric bands come together.
c)
Winds are generally strong because the equator is a region of mostly high air pressure.
d)
Winds are generally weak because the equator is a region of mostly low air pressure.
75.
Winds are named based on different factors. How are winds usually named?
a)
Winds are usually named based on their altitude.
b)
Winds are usually named based on their strength.
c)
Winds are usually named based on the direction in which they are blowing.
d)
Winds are usually named based on the direction from which they are blowing.
76.
Land and water absorb and release the sun’s heat in different ways. One result of this is a sea breeze. Which statement is true of sea breezes?
a)
They originate in the day and blow toward the land.
b)
They originate in the day and blow toward the water.
c)
They originate in the evening and blow toward the land.
d)
They originate in the evening and blow toward the water.
77.
Winds may be named for their location or for the direction from which they blow. Which winds blow from 30° latitude in both hemispheres almost to the equator?
a)
easterlies
b)
westerlies
c)
trade winds
d)
the doldrums
78.
Which type of breeze is illustrated in the figure?
a)
a sea breeze
b)
a land breeze
c)
a valley breeze
d)
a mountain breeze
79.
The global movement of air occurs in convection cells. In general, how does air move?
a)
from areas of higher pressure to areas of lower pressure
b)
from areas of lower pressure to areas of higher pressure
c)
from areas of higher temperature to areas of lower temperature
d)
from areas of lower temperature to areas of higher temperature
80.
Which three factors most directly affect surface currents in the oceans?
a)
upwelling, convection, and the sun’s energy
b)
deep currents, convection currents, and surface winds
c)
dissolved solids, dissolved gases, and the sun’s energy
d)
surface winds, the Coriolis effect, and continental deflection
81.
The atmosphere exerts a force (pressure) on Earth. Why does the atmosphere exert pressure on Earth?
a)
because of the pull of Earth’s gravity on air molecules
b)
because of electromagnetic radiation from outer space
c)
because of the effect of the ozone layer on solar radiation
d)
because of the effect of greenhouse gases on heat radiating from Earth
82.
Which of the following best describes the atmosphere?
a)
the layer of gases that surrounds Earth
b)
the layer above Earth that contains ozone
c)
the layer above Earth in which weather happens
d)
the layer above Earth that is responsible for gravity
83.
Which gas in Earth's atmosphere acts like a greenhouse?
a)
argon
b)
carbon dioxide
c)
nitrogen
d)
oxygen
84.
Which of the following correctly shows the chain of energy transfers that create surface currents on the ocean?
a)
solar energy —> wind energy —> surface currents
b)
wind energy —> solar energy —> surface currents
c)
tidal energy —> wind energy —> surface currents
d)
geothermal energy —> wind energy —> surface currents
85.
Which type of current occurs when surface water on the ocean becomes denser than the water below it and sinks?
a)
Coriolis current
b)
deep current
c)
surface current
d)
upwelling
86.
What causes convection currents to form in the oceans?
a)
surface winds
b)
the Coriolis effect
c)
continental deflection
d)
differences in water density
87.
How does convection cause ocean currents?
a)
During the process of convection, energy is transferred to the atmosphere, forming winds. These winds power surface currents.
b)
During the process of convection, the heating of surface water by the sun results in upwelling.
c)
During the process of convection, water that was warmed by the sun loses heat. The water cools, becomes denser, and sinks.
d)
During the process of convection, more minerals and gases dissolve in warm water. This increases the density of the warm water and causes it to sink.
88.
turning around on an axis
a)
rotation
b)
revolution
c)
orbit
d)
axis
89.
To move in a circular path around something.
a)
Spin
b)
Rotation
c)
Orbit
d)
Revolve
90.
The path the moon takes as it moves around the earth.
a)
Axis
b)
Equator
c)
Rotation
d)
Orbit
91.
An invisible line that runs through the earth, from the North Pole to the South Pole or an imaginary line that runs through the center of an object.
a)
Poles
b)
Revolve
c)
Hemisphere
d)
Axis
92.
The four parts of a year
a)
space
b)
season
c)
time
d)
tide
93.
The rise and fall of the ocean surface, most caused by the pull of the moon's gravity
a)
orbit
b)
waves
c)
tide
d)
gravity
94.
any stage in the series of changes in the appearance of the moon
a)
phase
b)
eclipse
c)
rotation
d)
orbit
95.
object that revolves around a larger object
a)
revolution
b)
rotation
c)
recommendation
d)
satellite
96.
What is the main reason the Moon can be seen from Earth?
a)
The Moon emits its own light.
b)
The Moon reflects sunlight.
c)
The Moon is a glowing ball of gas.
d)
The Moon reflects light from Earth.
97.
Which statement best explains why the same side of the Moon always faces Earth?
a)
The Moon revolves around Earth and rotates in about the same amount of time.
b)
The Moon does not rotate as it revolves around Earth.
c)
The Moon travels at a faster speed than Earth.
98.
Phases of the Moon depend on how much _____.
a)
distance is between Earth and the Moon
b)
of the lighted side of the Moon faces Earth
c)
shadow Earth makes on the Moon
d)
shadow the Moon makes on Earth
99.
At which position in the Moon’s orbit can all of the Moon’s lighted side be seen from Earth?
a)
A
b)
B
c)
C
d)
D
100.
Which number is a waxing gibbous moon?
a)
2
b)
4
c)
6
d)
8
101.
Which number shows a waning crescent moon?
a)
2
b)
4
c)
6
d)
8
102.
Between which two points will the Moon appear to change from a full moon to a quarter moon?
a)
T and Q
b)
Q and R
c)
R and S
103.
At position A, which hemisphere would have summer?
a)
Northern hemisphere
b)
Southern hemisphere
104.
What happens when the area in which you live tilts away from the sun?
a)
It is summer.
b)
It is spring.
c)
It is winter.
d)
It is fall.
105.
The term equinox means....
a)
equal amount of day light and equal amount of night
b)
Equal amount of winter and summer
c)
Equal amounts of hot dogs for everyone
d)
The longest day of the year
106.
Why do we experience the changing of the season on the earth?
a)
distance from the sun
b)
rotation of the earth
c)
change in solar output
d)
tilt of the earth's axix
107.
Why is the Equator warmest?
a)
Because it is closest to the sun.
b)
Because it receives the most direct sunlight
c)
Because no clouds form here.
d)
Because it is far from the sun
108.
Which season is taking place in the Southern Hemisphere in Position 1?
a)
Winter
b)
Spring
c)
Summer
d)
Fall
109.
Which season is taking place in the Northern Hemisphere in Position 1?
a)
Winter
b)
Spring
c)
Summer
d)
Fall
110.
Which season is taking place in the Northern Hemisphere in Position 2?
a)
Winter
b)
Spring
c)
Summer
d)
Fall
111.
Which season is taking place in the Northern Hemisphere in Position 4?
a)
Winter
b)
Spring
c)
Summer
d)
Fall
112.
Which season is taking place in the Northern Hemisphere in Position 3?
a)
Winter
b)
Spring
c)
Summer
d)
Fall
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