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8th Grade Science 3
Test Description: 8th grade science review 3
Instructions: Answer all questions to get your test result.
1) Which of the following explains why birds had different beak adaptations on the Galapagos islands?
A
Different climate
B
Different geographic area
C
Different predators
D
Different food sources
2) Which of the following is the most likely reason for the extinction of many organisms in recent geologic time?
A
Large scale volcanic activity changing the climate
B
Impact event from comet or asteroid
C
Climate change caused by an impact event
D
Habitat destruction and over hunting
3) Which of the following statements is correct about how geologic time is divided?
A
Eras are divided into epochs and epochs are divided into periods
B
Eras are divided into periods and periods are divided into epochs
C
Periods are divided into eras and eras are divided into epochs
D
Epochs are divided into periods and periods are divided into eras
4) Which of the following burns to produce energy?
A
Igneous rocks
B
Metals
C
Minerals
D
Fossil fuels
5) Which of the following is defined by the carrying away of rock?
A
Weathering
B
Deposition
C
Sedimentary
D
Erosion
6) Which of the following seismic waves cannot travel through the liquid metal outer core of Earth?
A
Surface waves
B
Primary waves
C
all of the answer choices
D
Secondary waves
7) During what moon phase would you expect moderately low and high neap tides?
A
new moon
B
waning gibbous
C
full moon
D
first quarter
8) Which of the following best describes how to create a destructive wave resulting in zero?
A
When a crest with an amplitude of 10 mm meets another crest with an amplitude of 20 mm
B
When a crest with an amplitude of 10 mm meets a trough with an amplitude of 10 mm
C
When a crest with an amplitude of 10 mm meets another crest with an amplitude of 10 mm
D
When a crest with an amplitude of 10 mm meets a trough with an amplitude of 20 mm
9) During what moon phases is a Solar eclipse possible?
A
waxing gibbous
B
first quarter
C
new moon
D
full moon
10) Which of the following correctly explains the relationship between the mass of an object and the amount of friction?
A
The less friction an object experiences the more mass it must have
B
The less massive an object the more friction it will experience
C
The more massive an object the more friction it will experience
D
The more friction an object experiences the less mass it must have
11) Which of the following correctly orders celestial objects from smallest to largest?
A
universe, galaxy, solar systems, planets, meteorites
B
planets, meteorites, stars, solar systems, galaxy, universe
C
meteorites, planets, stars, solar systems, galaxy, universe
D
stars, planets, meteorites, solar systems, galaxy, universe
12) When the northern hemisphere is tilted away from the Sun which of the following is true about South Carolina?
A
South Carolina gets more direct rays and longer days
B
South Carolina gets more direct rays and shorter days
C
South Carolina gets more indirect rays and longer days
D
South Carolina gets more indirect rays and shorter days
13) Which of the following forces can speed up and/or slow down the speed of an object?
A
air resistance
B
gravity
C
friction
D
all of the answer choices
14) If Joey is pushing a box to the right with 125 Newtons and Susie is pushing the same box with 125 Newtons the left. Which of the following correctly describes the motion of the box?
A
The object is balanced and will move 125 Newtons to the right
B
The object is balanced and will not move
C
The object is unbalanced and will move 125 Newtons to the right
D
The object is unbalanced and will move 250 Newtons to the left
15) Which of the following BEST explains why a heavier object is harder to move?
A
The more mass an object has the more inertia
B
the less mass an object has the more inertia
C
heavier object require more force because they have less inertia
D
The more mass an object has the less inertia
16) Which of the following is the lowest energy electromagnetic wave?
A
sound waves
B
radio waves
C
seismic waves
D
visible light
17) Which of the following BEST describes the difference between a TV and a remote control?
A
The remote control receives electromagnetic waves and the TV transmits electromagnetic waves
B
The TV interpretes electromagnetic waves and a remote control transmits electromagnetic waves
C
The TV transmits electromagnetic waves and a remote control receives electromagnetic waves
D
The remote control receives electromagnetic waves and the TV also receives electromagnetic waves
18) Wave #1 has a shorter wavelength than Wave #2. Which of the following is true?
A
Wave #1 has a greater energy and a greater frequency than Wave #2.
B
Wave #1 has a lower energy and a greater frequency than Wave #2.
C
Wave #1 has a greater energy and a lower frequency than Wave #2.
D
Wave #1 has a lower energy and a lower frequency than Wave #2.
19) Which of the following best explains why a prism seperates white light into various colors?
A
When visible light waves enter the medium of the prism at an angle they change speed and direction
B
When visible light waves enter the medium of the prism at an angle they transmit straight through
C
When visible light waves enter the medium of the prism at an angle they bounce off and change direction
D
When visible light waves enter the medium of the prism at an angle they are absorbed and generate heat
20) Which of the following best explains how we see black colored objects?
A
the object absorbs all of the visible light waves
B
the object refracts all of the visible light waves
C
the object reflects all of the visible light waves
D
the object transmits all of the visible light waves
*select an answer for all questions
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