1. Energy Test Review

2. A television set changes electrical energy to sound and light energy
A television set changes electrical energy to sound and light energy. In this process some energy is
created
destroyed
changed to matter
changed to heat

3. Kinetic energy increases as
mass increases and velocity decreases
mass decreases and velocity stays the same
both mass and velocity increase
both mass and velocity decrease

4. Use the transformation sequence below to answer the question chemical energy  thermal energy mechanical energy The sequence of energy changes shown in the diagram explains which event?
a candle burns
a flashlight is on
gasoline burns to move the pistons in a car engine
electric current runs a refridgerator

5. An electric fan converts
kinetic energy to mechanical energy, heat, and sound
kinetic energy to electrical energy, heat, and sound
electrical energy to mechanical energy, heat, and sound
electrical energy to chemical energy, heat, and sound

6. Work can be considered the transfer or ______ to an object.
energy
force
motion
friction

7. The Law of Conservation of energy states that when one form of energy is converted to another
energy is destroyed in the process
energy is created in the process
energy is not created or destroyed in the process
some energy is converted to matter in the process

8. Heat transfer occurs in many directions
only from warm objects to colder ones
only from cold objects to warmer ones
randomly

9. Think about a lava lamp, which is a good example of the three main ways thermal energy is transferred. Define each method of transfer, identify where it occurs, and explain how each method demonstrates the transfer of thermal energy.
Definition
Where it Occurs
Explanation
Conduction
The transfer of heat between substances that are in direct contact with each other
Bulb  glass
Liquid  glass
Glass  air
Substances are in direct contact when heat is transferred
Convection
Transfer of thermal energy due to the flow of particles
Rise and fall of oil in lava lamp
Convection current created when warm oil rises to top of lamp
Radiation
Transfer of TE that does not require matter
Light from bulb
Heat from lamproom
Could occur without air
(light energy)

10. What is the gravitational potential energy of 95kg diver on a diving board that is 22 meters above the pool?
Formula: GPE = m x 9.8 x h Answer: 20,482 J

11. What is the kinetic energy of Steven riding his bike (combined mass of Steven and his bike 115 kg) at a velocity of 3.5 m/s?
Formula: KE = 1 2 𝑚𝑣 2 Answer J