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8th Grade Science Midterm Review

Total questions: 73

Worksheet time: 3610secs

Name
Class
Date
1.
A hypothesis is often tested with a controlled _______
a)
experiment 
b)
observation 
c)
theory
d)
law 
2.
A pattern or event in nature that is always true is what 
a)
scientific law 
b)
scientific theory
c)
hypothesis 
d)
controlled experiment 
3.
A possible explanation to a problem, that can be tested is what 
a)
observation
b)
prediction 
c)
hypothesis 
d)
experiment 
4.
The time it takes to run a mile depends on the persons running speed. Name a constant variable. 
a)
The persons running speed 
b)
Same track, same stop watch used, same people performing the experiment.
c)
Same running speed and same track 
d)
The time it takes to run a mile 
5.
The height of the bean plant depends on how much water they receive. What is the dependent variable? 
a)
Same amount of sunlight
b)
Same soil and water
c)
How much water they received
d)
The height of the bean plant 
6.
Why is it important to perform multiple trials during an experiment? 
a)
It makes sure your results are more accurate 
b)
It fixes errors from the experiment 
c)
It allows you to keep track of your materials 
d)
It is not important to have multiple trials 
7.
A__________ is a statement that can be tested, either by experiment or observation. It is sometimes written in an "if_then" format. 
a)
Hypothesis
b)
Independent Variable 
c)
Testable Question 
d)
Theory 
8.
In science, a dominant explanation supported by a very large amount of evidence is called a...
a)
Hypothesis 
b)
Theory
c)
Research question 
d)
Testable question 
9.
What is happening to the temperature in New York City?
a)
It is remaining about the same.
b)
It is mostly decreasing.
c)
It is mostly increasing.
d)
There is a pattern of increasing and decreasing.
10.
The number of apples in this basket is ______________________ data?
a)
quantitative
b)
qualitative
c)
independent
d)
dependent
11.
The dependent variable in this experiment is - 
a)
Number of Bacteria
b)
Time of Incubation
c)
Culture Number
d)
Type of Bacteria
12.
What can you infer about the temperature for E.coli bacterial growth?
a)
E. coli does not grow well at low and high temperatures.
b)
E coli will continue to grow at very high temperatures.
c)
E.coli grows best at very low temperatures
d)
E.coli grows best at very high temperatures.
13.
A biology class of 24 students decides to measure the height of each student and then calculate the average height for the class. Which of these is a possible source of error in this activity?
a)
The number of males and females in the class
b)
The difference in the ages of the students in the class
c)
The total number of students in the class
d)
The accuracy of making and recording measurements
14.
What is the tool you would use to measure the mass of an apple?
a)
Metric ruler
b)
Scale
c)
Graduated Cylinder
d)
Triple Beam Balance
15.
Data that is observed using your 5 senses and is described through the use of WORDS is...
a)
Quantitative Data
b)
Qualitative Data
16.
Which of the following hypotheses is written correctly?
a)
Frozen tennis balls will not bounce as high.
b)
If I heat up a tennis ball it will bounce high.
c)
If I freeze a tennis ball, then it will not bounce as high.
d)
If a tennis ball is frozen, then it won't bounce as high as one that is not frozen.
17.
Imagine that a scientist suggests that the size of an insect population depends on the temperature. What observations must this scientists make in order to collect evidence to support his or her theory or idea?
a)
The scientist must observe the insect population only in summer.
b)
The scientist must observe the insect population in the lab.
c)
The scientist must observe the insect population in different areas.
d)
The scientist must observe the insect population throughout the year.
18.
Scientist communicate their results by publishing their work.  Why is it important for scientist do this?
a)
to learn from each other
b)
to keep their work secret
c)
to compete with other scientist
d)
so the experiment are not repeated
19.
Scientist usually write reports about their investigations.  Why do they do this?
a)
to classify results
b)
to ask questions
c)
to perform experimental trials
d)
to communicate their work to other scientists
20.
What part of the moon do we see from Earth?
a)
all of it
b)
the same side
c)
none of it
d)
only one quarter
21.
The moon seems to change shape from day to day in a cycle that lasts about a month as it goes through _.
a)
revolutions
b)
phases
c)
rotations
d)
eclipses
22.
As the moon's shape appears to get smaller, we say that the moon is _.
a)
swelling
b)
waxing
c)
waning
d)
disappearing
23.
About how long does it take the moon to make one complete cycle around the earth?
a)
65 days
b)
8 days
c)
365 days
d)
28 days
24.
Which moon phase is when you can't see the moon at all?
a)
Waning crescent
b)
Full moon
c)
Waxing gibbous
d)
New moon
25.
Phases of the moon in which the moon appears to be getting larger are referred to as _.
a)
waxing
b)
waning
c)
new
d)
eclipse
26.
The cycle of the moon lasts about a _.
a)
day
b)
year
c)
week
d)
month
27.
During the phases of the Moon, the Moon appears to change shape.  This change in appearance is due to the Moon...
a)
physically changing size and shape.
b)
moving closer and then farther away from Earth.
c)
reflecting a different amount of light due to alignment with Earth and the Sun.
d)
having craters on its surface.
28.
One complete revolution of the Earth around the sun takes about
a)
one rotation
b)
half a year
c)
one year
d)
one season
29.
The Earth takes about __________________ hours to complete one rotation of its axis.  
a)
12
b)
24
c)
14
d)
28
30.
At all times the moon is half lit up by the sun.             
a)
true
b)
false
31.
The spinning of an object on its axis is called______
a)
orbit
b)
rotation
c)
revolution
d)
tide
32.
Day and night is caused by the _____________ of earth on its axis.
a)
revolution
b)
orbit
c)
rotation
33.
As the Earth travels around the sun, this tilt causes different areas of the Earth’s surface to get different amounts of daylight at different times of the year. The angle of the Sun’s rays to the surface also causes areas to have more or less of the Sun’s energy. This causes the ________.
a)
months
b)
day and night
c)
seasons
d)
years
34.
A body that orbits a planet is a...
a)
Meteor
b)
Asteroid
c)
Satellite
d)
Comet
35.
A ______ eclipse occurs when the moon passes between Earth and the sun, blocking the sunlight from reaching Earth. The moon's shadow then hits Earth.   
a)
solar eclipse
b)
lunar eclipse
c)
vernal equinox
d)
autumnal equinox
36.
  What does "geo-" mean?
a)
Earth
b)
sun
c)
Center
37.
Why did people believe in the Geocentric vs the Heliocentric solar system?
a)
Geocentric system had been around for a LONG time.
b)
People don't like change.
c)
There wasn't enough proof  to support the Heliocentric system.
d)
all of these answers are correct.
38.
This image shows the:
a)
Geocentric Solar System
b)
Heliocentric Solar System
39.
What model does this represent?
a)
Geocentric 
b)
Heliocentric 
40.
What does "helios" mean?
a)
Earth
b)
center of
c)
sun
d)
moon
41.
What is in the center of the Heliocentric Model?
a)
Sun
b)
Comet 
c)
Jupiter
d)
Earth
42.
Sun Centered
a)
Heliocentric
b)
Geocentric
c)
Aphelion
d)
Perihelion
43.
A force of attraction between objects that is due to their masses. 
a)
Solar Flare
b)
Orbit
c)
Gravity
d)
Centripetal Force
44.
The sun and all of the planets and other bodies that travel around it. 
a)
Geocentric
b)
Centripetal Force
c)
Sunspot
d)
Solar System
45.

What is gravity?

a)

a force of attraction between objects that is due to their masses

b)

an unbalanced force that makes objects move in an elliptical path

c)

the rotating cloud of gas and dust from which the sun and planets formed

d)

the point in the orbit of a planet at which the planet is farthest from the sun

46.

The distance between objects, along with the masses of the objects, affect the gravitational force between the objects. Which statement is true according to Newton’s law of universal gravitation?

a)

When the masses of objects increase, gravitational force decreases.

b)

When distance between objects increases, gravitational force decreases.

c)

When distance between objects decreases, gravitational force decreases.

d)

When the masses of objects decrease, the distance between objects decreases.

47.

The process by which two or more low-mass atomic nuclei fuse to form another, heaver nucleus is called_______.

a)

Nuclear Fusion

b)

Sunspot

c)

Prominence

d)

Core

48.

A ___________ is a dark area on the surface of the sun that is cooler than the surrounding areas.

a)

Nuclear Fusion

b)

Sunspot

c)

Prominence

d)

Photosphere

49.

What is the layer of the sun in which energy is produced?

a)

Radiative Zone

b)

Convective Zone

c)

Photosphere

d)

Core

50.

What is the layer of the sun from which energy escapes from space?

a)

photoshpere

b)

chromosphere

c)

corona

d)

core

51.

What is the layer of the sun through which energy is transferred away from the core by radiation?

a)

Radiative Zone

b)

Convective Zone

c)

Photosphere

d)

Core

52.

How is energy transported from the core to the surface of the sun by radiation and by convention.

a)

Radiation:Light particles bounce towards the convective zone. Convention: Hotter gases rise to the sun's surface, and then cooled and sink. This is a circular pattern.

b)

Radiation:Hotter gases rise to the sun's surface, and then cooled and sink. This is a circular pattern. Convention: Light particles bounce towards the convective zone

c)

The sun does not use radiation and convention. This is a trick question.

53.

What is the name of the galaxy in which we live?

a)

Earth

b)

Andromeda

c)

Milky Way

d)

Solar System

54.

What type of galaxy is the Milky Way?

a)

Spiral galaxy

b)

Elliptical galaxy

c)

Irregular galaxy

55.

Place these objects in order from smallest to largest:

a)

Planets, solar system, universe, galaxy

b)

Solar system, planets, galaxy, universe

c)

Planets, solar system, galaxy, universe

d)

Galaxy, solar system, planets, universe

56.

What is the name of the only star in our solar system?

a)

Polaris

b)

Alpha Centauri A

c)

Sirius

d)

The sun

57.

A Galaxy is a collection of stars, gas, and dust bound together by Gravity.

a)

False

b)

True

c)

Don't Know

d)

Pop songs rock

58.

__________________ is a huge collection of stars

a)

Universe

b)

Carma

c)

Galaxy

d)

Solar System

59.

Place these objects in order from smallest to largest:

a)

Planets, solar system, universe, galaxy

b)

Solar system, planets, galaxy, universe

c)

Planets, solar system, galaxy, universe

d)

Galaxy, solar system, planets, universe

60.
What is weight?
a)
Weight is the amount of material in an object?
b)
Weight is the physical dimensions of an object?
c)
Weight is the gravitational pull on an object
d)
Weight is the volume of an object
61.
How would the force of gravity between Earth and its moon be affected if the mass of the moon were less?
a)
The force of gravity would be unchanged.
b)
The force of gravity would be greater.
c)
The force of gravity would be less.
d)
The would be no force of gravity.
62.
If Saturn has more mass than Earth, how would this affect your weight on Saturn?
a)
I will weigh more on Saturn
b)
I will weigh less on Saturn
c)
My weight will stay the same
d)
I will have no weight at all
63.
Which day of the year has the least amount of daylight?
a)
Winter Solstice
b)
Summer Solstice
c)
Autumnal Equinox
d)
Vernal Equinox
64.
When there is Equal hours of day and night, the Season is ______________.
a)
Winter
b)
Spring or Fall
c)
Summer
d)
Hunting Season
65.
The Earth's axis is angled at _______ degrees.
a)
180
b)
90
c)
45
d)
23.5
66.
Two factors effecting the strength of the force of gravity between 2 objects are...
a)
mass and distance 
b)
mass and matter
c)
distance and weight 
d)
weight and mass
67.
Which model has greater gravitational attraction (if any)
a)
Model A
b)
Model B
c)
Both Model A and Model B (same gravity)
68.
A collection of beliefs such, such as astrology, is known as...
a)
Pseudoscience 
b)
Fact
c)
Theory
d)
Law
69.
Which question can best be investigated by a scientist?
a)
Should I buy a red shirt or a green shirt?
b)
Does chocolate milk or plain milk taste better?
c)
Does a plant need sunlight to grow?
d)
Which feels softer, cat fur or dog fur?
70.
In order for an explanation to be considered scientific, it must be based on ____________.
a)
an inference
b)
a conclusion
c)
past experience
d)
evidence
71.
Which is not a pseudoscience?
a)
Religion
b)
Astrology
c)
Superstitions
d)
Ecology
72.
The word stem pseudo- means:
a)
false
b)
true
c)
understand
d)
science
73.
Which one the following is NOT a branch of science, but a pseudoscience because it not testable, repeatable and observable by scientific standards. 
a)
A. astronomy: study of physical objects (such as stars, galaxies, planets, moons, asteroids, comets and nebulae) and processes (such as supernovae explosions, gamma ray bursts, and cosmic microwave background radiation)
b)
B. physics: the study of properties of matter and energy (mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms)
c)
C. biology: the study of living organisms
d)
D. astrology: the study of how the positions of the stars and movements of the planets have a supposed influence on events and on the lives and behavior of people

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