Unit 1 Energy and Heat Retake 24-25

light energy

kinetic energy

elastic potential energy

gravitational potential energy

light energy

kinetic energy

electrical energy

chemical potential energy

bouncing a basketball

a jar sitting on a counter

a rock resting on top of a cliff

two bricks stacked on top of each other

on top of the tallest hill

at the bottom of the tallest hill

at the bottom of the shortest hill

half way through the loop-de-loop

Elastic potential energy will decrease.

Elastic potential energy will increase.

Chemical potential energy will increase.

Gravitational potential energy will decrease.

A. Tony: "At point 1, the ball has the most kinetic and the least potential energy."

B. Kira: "At point 2, the ball's kinetic energy is changing into potential energy."

C. Sarah: "At point 3, the ball has the most kinetic and the least potential energy."

D. Tom: "At point 4, the ball's potential energy is changing into kinetic energy."

As the apple falls its mass increases, and as a result its kinetic energy increases.

As the potential energy decreases in the apple, the kinetic energy of the apple increases.

The amount of kinetic and potential energy is equal in the bottom of the apple's fall.

As the kinetic energy increases, the potential energy increases.

electrical energy --> chemical energy

electrical energy --> thermal energy

chemical energy --> thermal energy

thermal energy --> electrical energy

The kinetic energy of the hot dog is converted into potential energy.

The sound energy of the hot dog is converted into mechanical energy.

The chemical energy from the hot dog is converted into sound energy and thermal energy.

The chemical energy from the hot dog is converted into mechanical and thermal energy.

A 200g soccer ball moving at 10 m/s

A 200g soccer ball moving at 8 m/s

A 200g soccer ball moving at 20 m/s

A 200g soccer ball moving at 15 m/s

Car A has more energy than Car B because it is traveling faster than Car B.

Car A has more energy than Car B because it has a smaller mass than Car B.

Car B has more energy than Car A because it has a bigger mass than Car A.

Both cars have about the same energy because they have about the same mass.

Use a wrecking ball with a smaller mass.

Decrease the speed of the wrecking ball.

Use a wrecking ball with a bigger mass.

None of the above, the kinetic energy cannot be changed.

The object with less mass will have greater kinetic energy.

The object with greater mass will have greater kinetic energy.

Both objects will have the same kinetic energy because they are traveling at the same speed.

We can’t tell which has greater kinetic energy from this information.

Radiant energy warms the thermometer.

Convection carries heat to the thermometer.

Mechanical energy from the flame carries heat to the thermometer.

Heat from the flame is conducted through the metal to the thermometer.

Sunburn = radiation; smoke rising = convection; feeling heat from the fire = radiation; touching hot pan = convection

Sunburn = radiation; smoke rising = conduction; feeling heat from the fire = radiation; touching hot pan = conduction

Sunburn = radiation; smoke rising = convection; feeling heat from the fire = radiation; touching hot pan = conduction

Sunburn = conduction; smoke rising = convection; feeling heat from the fire = radiation; touching hot pan = convection

Cool air is less dense than hot air.

Warm air rises and cool air sinks.

Cool air rises and warm air sinks.

The upstairs rooms are closer to the Sun.

The spoon cools and the tea will warm because thermal energy travels from the warm spoon to the cold tea.

The spoon will get cooler because the cold tea will conduct thermal energy to the warm spoon.

The tea and the spoon will both become cooler.

The two will remain the same temperature.