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Unit 6 Review
Test Description: Energy Transfers
Instructions: Answer all questions to get your test result.
1) Which of the following energy transformations occur when the lamp is plugged into the outlet and the bulb is inserted into the lamp?
A
Light to Thermal to Electrical
B
Thermal to Electrical to Light
C
Electrical to Light to Thermal
D
Electrical to Thermal to Light
2) What energy transformation occurs when a hot plate is plugged into the outlet and the control knob is in the on position?
A
Mechanical energy to thermal energy
B
Electrical energy to thermal energy
C
Thermal energy to mechanical energy
D
Thermal energy to electrical energy
3) Which best explains thermal energy transfer by conduction?
A
Metal spoon in hot water
B
Air warming above a radiator in a room
C
Warming hand next to a fire
D
The Sun warming the Earth
4) How does transfer of thermal energy by radiation differ from convection and conduction?
A
Convection and conduction transfer thermal energy through solids, liquids, or gases.
B
Radiation requires direct contact between particles for thermal energy transfer.
C
Convection and conduction use currents to transfer thermal energy in solids, liquids, or gases.
D
Radiation can transfer thermal energy through space in addition to solids, liquids, or gases.
5) Heat transfers from:
A
Cooler to warmer objects
B
Warmer to cooler objects
6) Which scenario describes a transformation of thermal energy into chemical energy?
A
The oven bakes dough into bread.
B
You turn on the heater in your car.
C
The UV light from the Sun causes a sunburn.
D
The Sun’s energy causes you to sweat.
7) A hydroelectric power plant works by using flowing water to turn a turbine. The turbine is connected to a magnet inside of a generator. When the magnet turns inside of the generator, the coiled wire surrounding the magnet will generate....
A
Chemical to electrical
B
Electrical to mechanical
C
Chemical to mechanical to electrical
D
Mechanical to electrical
8) When a hawk eats a mouse and then uses the energy from the mouse to fly, the hawk’s body converts —
A
mechanical energy to thermal energy
B
thermal energy to mechanical energy
C
mechanical energy to chemical energy
D
chemical energy to mechanical energy
9) When you see arrows forming a current on a picture with a fluid or air heating, rising, cooling, and coming back down....what form of heat transfer is this?
A
Convection
B
Conduction
C
Radiation
10) States that energy is neither created or destroyed; it only changes forms.
A
Heat (thermal) energy
B
Energy
C
Law of conservation of energy
*select an answer for all questions
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