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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
High mass and high height
B
High mass and low height
C
Low mass and high height
D
Low mass and Low height
2) What energy transformation takes place when a radio is plugged in and turned on?
A
Wire to radio waves
B
Kinetic to potential
C
Electrical to sound
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
Temperature energy transforming to braking energy
B
Motion (kinetic) transforming to thermal energy
C
Thermal energy transforming to motion (kinetic)
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
Transmitted
C
Absorbed
D
Scattered
6) If there is no force acting on an object, it will
A
Move in the same direction
B
Move with the same speed AND 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
More than one force
B
No force
C
A balanced force
D
An unbalanced force
8) A bird flies 50 meters in 10 seconds. What is its speed?
A
5 meters per second
B
0.2 meters per second
C
0.2 seconds per meter
D
5 seconds per meter
9) What is the force needed to accelerate a 10 kg object at 2 m/s2?
A
0.2 N
B
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 slow down and turn
C
It will travel in a straight line but eventually slow down
D
It will continue to speed up indefinitely
11) What safety rules should you always follow while doing a science laboratory?
A
All of the above
B
Tell your teacher immediately if a spill occurs
C
Wear safety goggles at all times
D
Clearly label all chemicals
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
Mineral oil
B
Water
C
Mercury
D
Both mercury and mineral oil would float to the top
13) Which of the following is an example of a mixture that can be separated using a filter?
A
Sand and water
B
Saltwater
C
Water and alcohol
D
Iron and sand
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
Density, conductivity, reaction with acid
B
Electrical conductivity, hardness, ability to transmit light
C
Temperature change when a chemical is added, texture, density
D
Flexibility, reaction with hydrochloric acid, color
16) Which of the following is a compound
A
Ca
B
N
C
Na
D
CO
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 resulting clear liquid and the beaker
C
The initial two clear liquids
D
The orange solid precipitate
18) Which of the following statements about dilution as an approach to handling toxic water is TRUE?
A
Dilution lowers the concentration of toxic materials in liquid wastes
B
Diluting a liquid until it is clear and colorless means that the liquid is safe for disposal in local sewers
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
Spices
B
Water
C
Salt
D
Vegetables
20) Water that is traveling through the water cycle can pick up contaminants
A
When traveling as surface water in a river
B
When falling through the air as precipitation
C
When traveling underground as groundwater
D
All of the above
*select an answer for all questions
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