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- 1. Multiple Choice
Wind turbines change kinetic energy into ________ energy.
chemical
electirc
nuclear
sound
- 2. Multiple Choice
The amount of kinetic energy depends on:
mass
speed
mass and speed
direction
- 3. Multiple Choice
The faster the blades turn the ____ kinetic energy is made.
same
more
less
none of these
- 4. Multiple Choice
Which type of energy is stored?
potential
kinetic
seismic
radiant
- 5. Multiple Choice
There is more gravitational potential energy when there is more____.
mass
volume
distance
mass and distance
- 6. Multiple Choice
Which type of electricity is made with gravitational potential energy?
solar
wind
geothermal
hydroelectric
- 7. Multiple Choice
What is it called when one type of energy changes into another type of energy?
energy change
energy transfer
energy transformation
energy creation
- 8. Multiple Choice
What does the law of energy conservation say?
energy can be transformed
energy cannot be created
energy cannot be destroyed
all of these
- 9. Multiple Choice
What energy transformation happens to keep these eggs warm?
radiant to thermal
electric to thermal
mechanical to thermal
kinetic to thermal
- 10. Multiple Choice
What equation do we use to calculate work?
work = force + distance
work = force - distance
work = force x distance
- 11. Multiple Choice
Calculate the work:
the force is 30N and the distance is 50m
80J
20J
150J
120J
- 12. Multiple Choice
Simple machines do work with:
one movement
two movements
many movements
few movements
- 13. Multiple Choice
How do simple machines make work easier?
they change the force
they change the distance
they increase the work
they change the force and distance
- 14. Multiple Choice
What type of simple machine is this?
inclined plane
screw
lever
pulley
- 15. Multiple Choice
Efficiency is the ratio of ______ work to _____ work.
input to input
output to output
input to output
output to input
- 16. Multiple Choice
Calculate the efficiency:
output work = 65J input work = 75J
115%
78%
511%
87%
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