Changes in Energy

What is the flow of thermal energy between things that are touching? (page 93)

• conduction

• refresh

• generate

• conservation

What is the best example of stored energy changing to energy of motion? (page 92)

• making a call with your phone

• dropping a coin out of your pocket

• turning on a light

• stepping on a rug

What is a measure of the energy that is transferred from one object to another to move the object?

(page 92)

• conduction

• source

• stored

• work

Which forms of energy increase when a bicycle goes from slow to fast? (pages 85-87)

• mechanical and kinetic

• thermal and electrical

• chemical and light

• potential and electrical

Which of the following is an example of potential energy changing into kinetic energy? (page 92)

• You sit on your bike at the top of a hill.

• There is a jack-in-the-box with the lid closed on your bed.

• A runner stands at the starting line of a race.

• A book falls off the edge of your desk.

What are waves of energy? (page 94)

• when energy is stored

• a disturbance that carries energy from one point to another.

• when energy stays still

• when there is no energy

What is the scientific meaning of the word work? (page 92)

• Work is doing a job for pay.

• Work is finding an answer to a hard question.

• Work is done when someone becomes upset.

• Work is done when a force moves or changes an object.

What happens when you turn on a light switch? (page 97)

• electrical energy → potential energy → light energy

• sound energy → electrical energy → kinetic energy

• electrical energy → light energy + heat

• electrical energy → thermal energy → potential energy

In which of the following is work being done? (page 92)

• You increase the heat under a pot of water so the water will boil faster.

• You push a door open.

• A battery has stored chemical energy.

• A mattress has springs in it.

What happens in our body when we use the food we eat to move? (page 97)

• Chemical energy stored in our bodies change to kinetic energy when we move.

• Heat energy in our body changes to electrical energy when we move.

• Sound energy in our body changes to thermal energy when we move.

• Light energy in our body changes to potential energy when we move.