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Energy Test Review
Test Description: Energy sources energy tranformations heat transfer electricity & magnetism
Instructions: Answer all questions to get your test result.
1) A pot can be heated when it is held over a fire. In the same way, the Earth is heated by the Sun. This is an example of which type of heat transfer?
A
convection
B
conduction
C
insulation
D
radiation
2) The water inside of a pot can be heated to a boil as the particles of water move around throughout the pot. This is an example of which type of heat transfer?
A
conduction
B
insulation
C
radiation
D
convection
3) The lightbulbs in our classroom turn on by the flick of a switch. Which of the following explains why this happens?
A
The lightbulb is rotated so that mechanical energy is created.
B
The lightbulb is heated until it starts to give off light.
C
The lightbulb is connected to a circuit that allows electrical energy to flow through it.
D
The lightbulb is the site of a chemical reaction that produces light.
4) When it becomes part of an electrical circuit, which of the following items has the ability to transform electricity into sound?
A
dog whistle
B
ceiling fan
C
television
D
lightbulb
5) The temperature inside a room is about 20 degrees Celsius; however, it is snowing outside. People inside the room are able to stay warm because they have transformed electrical energy into
A
chemical energy.
B
kinetic energy.
C
mechanical energy.
D
thermal energy.
6) According to the Law of Conservation of Energy, in all energy transformations, the total amount of energy
A
increased when it transformed.
B
decreased when it transformed.
C
remained the same when it turned into another type of energy.
D
disappeared when it turned into another type of energy.
7) Plants use photosynthesis to create their own food. This involves which of the following energy transformations?
A
solar to mechanical energy
B
solar to electrical energy
C
solar to kinetic energy
D
solar to chemical energy
8) Which of the following is NOT a way to increase the strength of an electromagnet?
A
increase the number of coils around the core
B
decrease the number of batteries
C
wrap the coils closer together
D
increase the voltage of the battery
9) The purpose of a simple electric motor is to transform electrical energy into
A
potential energy.
B
solar energy.
C
chemical energy.
D
mechanical energy.
10) Which of the following is NOT a source of chemical energy?
A
gasoline
B
a hamburger
C
a match
D
a rolling ball
*select an answer for all questions
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