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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
Battery to motion
B
Wire to radio waves
C
Electrical to sound
D
Kinetic to potential
3) Which list consists of only renewable energy sources?
A
Nuclear, petroleum, wind, hydroelectric
B
Petroleum, tidal, solar, biomass
C
Solar, nuclear, coal, wind
D
Wind, solar, hydroelectric, tidal
4) Cory noticed that the hood of the car was hot after driving it for awhile. What energy transformation was she noticing?
A
Thermal energy transforming to motion (kinetic)
B
Chemical energy transforming to thermal energy
C
Temperature energy transforming to braking energy
D
Motion (kinetic) 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
Transmitted
B
Scattered
C
Reflected
D
Absorbed
6) If there is no force acting on an object, it will
A
Eventually slow down and stop
B
Move with the same speed AND direction
C
Move at the same speed
D
Move in the same direction
7) What does it take to change the direction or speed of an object?
A
More than one force
B
An unbalanced force
C
A balanced force
D
No force
8) A bird flies 50 meters in 10 seconds. What is its speed?
A
5 seconds per meter
B
0.2 seconds per meter
C
0.2 meters per second
D
5 meters per second
9) What is the force needed to accelerate a 10 kg object at 2 m/s2?
A
2 N
B
20 N
C
5 N
D
0.2 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 travel in a straight line but eventually slow down
C
It will slow down and turn
D
It will continue to speed up indefinitely
11) What safety rules should you always follow while doing a science laboratory?
A
Tell your teacher immediately if a spill occurs
B
All of the above
C
Clearly label all chemicals
D
Wear safety goggles at all times
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
Water
B
Mineral oil
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
Iron and sand
B
Saltwater
C
Water and alcohol
D
Sand and water
14) When choosing a material to make a product, such as a soft drink container, an important factor to consider is
A
All of the above
B
How much it costs to produce
C
The environmental impact of the manufacturing process
D
How easy it is to recycle after the container is used
15) Which of the following is a list of physical properties
A
Flexibility, reaction with hydrochloric acid, color
B
Electrical conductivity, hardness, ability to transmit light
C
Density, conductivity, reaction with acid
D
Temperature change when a chemical is added, texture, density
16) Which of the following is a compound
A
Ca
B
CO
C
Na
D
N
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
The orange solid precipitate
B
All of the above
C
The resulting clear liquid and the beaker
D
The initial two clear liquids
18) Which of the following statements about dilution as an approach to handling toxic water is TRUE?
A
All of the above
B
Diluting a liquid until it is clear and colorless means that the liquid is safe for disposal in local sewers
C
Dilution lowers the concentration of toxic materials in liquid wastes
D
Dilution removes the toxic materials in clear liquid wastes
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
Spices
C
Salt
D
Vegetables
20) Water that is traveling through the water cycle can pick up contaminants
A
All of the above
B
When traveling as surface water in a river
C
When traveling underground as groundwater
D
When falling through the air as precipitation
*select an answer for all questions
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