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8th Grade Final Review
Test Description: Review for the final
Instructions: Answer all questions to get your test result.
1) Object of different masses are suspended from a height. Which combination of features will have the greatest gravitational potential energy?
A
Low mass and Low height
B
High mass and low height
C
High mass and high height
D
Low mass and high height
2) What energy transformation takes place when a radio is plugged in and turned on?
A
Electrical to sound
B
Kinetic to potential
C
Wire to radio waves
D
Battery to motion
3) Which list consists of only renewable energy sources?
A
Solar, nuclear, coal, wind
B
Petroleum, tidal, solar, biomass
C
Wind, solar, hydroelectric, tidal
D
Nuclear, petroleum, wind, hydroelectric
4) Cory noticed that the hood of the car was hot after driving it for awhile. What energy transformation was she noticing?
A
Motion (kinetic) transforming to thermal energy
B
Thermal energy transforming to motion (kinetic)
C
Temperature energy transforming to braking energy
D
Chemical energy transforming to thermal energy
5) On a summer day, asphalt in hot on your bare feet because the asphalt has ______ heat from the sun.
A
Reflected
B
Scattered
C
Absorbed
D
Transmitted
6) If there is no force acting on an object, it will
A
Move with the same speed AND direction
B
Move in the same direction
C
Move at the same speed
D
Eventually slow down and stop
7) What does it take to change the direction or speed of an object?
A
A balanced force
B
No force
C
More than one force
D
An unbalanced force
8) A bird flies 50 meters in 10 seconds. What is its speed?
A
5 seconds per meter
B
5 meters per second
C
0.2 meters per second
D
0.2 seconds per meter
9) What is the force needed to accelerate a 10 kg object at 2 m/s2?
A
2 N
B
0.2 N
C
20 N
D
5 N
10) Imagine you were able to throw ball in a frictionless environment such as outer space. Once you let go of the ball, what will happen to the ball according to the Law of Inertia?
A
It will travel in a straight line indepfinitely
B
It will continue to speed up indefinitely
C
It will slow down and turn
D
It will travel in a straight line but eventually slow down
11) What safety rules should you always follow while doing a science laboratory?
A
Wear safety goggles at all times
B
Tell your teacher immediately if a spill occurs
C
Clearly label all chemicals
D
All of the above
12) Mineral oil is less dense than water. Mercury, a liquid metal, is more dense than water. If mineral oil, mercury, and water were mixed together, which liquid would float to the top?
A
Both mercury and mineral oil would float to the top
B
Mineral oil
C
Water
D
Mercury
13) Which of the following is an example of a mixture that can be separated using a filter?
A
Iron and sand
B
Sand and water
C
Saltwater
D
Water and alcohol
14) When choosing a material to make a product, such as a soft drink container, an important factor to consider is
A
How easy it is to recycle after the container is used
B
The environmental impact of the manufacturing process
C
All of the above
D
How much it costs to produce
15) Which of the following is a list of physical properties
A
Electrical conductivity, hardness, ability to transmit light
B
Flexibility, reaction with hydrochloric acid, color
C
Temperature change when a chemical is added, texture, density
D
Density, conductivity, reaction with acid
16) Which of the following is a compound
A
Na
B
CO
C
N
D
Ca
17) While working on an activity to investigate chemical reactions, a student mixes two clear liquids in a beaker. When the two liquids mix, the result is a clear liquid and an orange solid precipitate. Which best describes the reactants?
A
All of the above
B
The initial two clear liquids
C
The orange solid precipitate
D
The resulting clear liquid and the beaker
18) Which of the following statements about dilution as an approach to handling toxic water is TRUE?
A
Diluting a liquid until it is clear and colorless means that the liquid is safe for disposal in local sewers
B
Dilution lowers the concentration of toxic materials in liquid wastes
C
Dilution removes the toxic materials in clear liquid wastes
D
All of the above
19) Some salt, vegetables, and spices are added to some hot water. The salt disappears into the water, the vegetables sink to the bottom, and the spices float. Which of the following is the solute in this mixture?
A
Water
B
Salt
C
Vegetables
D
Spices
20) Water that is traveling through the water cycle can pick up contaminants
A
When traveling underground as groundwater
B
When falling through the air as precipitation
C
When traveling as surface water in a river
D
All of the above
*select an answer for all questions
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