energy changes

Rex is building a campfire. He starts with wood, lights the fire, and uses the fire to roast a marshmallow. What type of energy causes the marshmallow to brown?

• heat

• light

• magnetic

• sound

A lamp is switched on and the bulb begins to glow. Which types of energy are being released?

• heat and light

• sound and light

• heat and magnetic

• magnetic and sound

__________ is a form of energy we can hear

• Heat

• Sound

• Kinetic

• Chemical

Identify the type of energy

• Sound energy

• Thermal energy

• Electrical Energy

• Mechanical energy

Which statement is not true about energy?

• Energy can change from one form to another

• Energy can be created

• Energy cannot be destroyed

Energy ... from one form to another.

• stays

• changes

• jumps

• rests

• Light energy + Heat energy

• Light energy + Sound energy

• Kinetic energy + Heat energy

• Sound energy + Heat energy

Energy can be ____

• made

• lost

• destroyed

• transferred

This picture shows a kettle filled with water placed over a stove.

The correct statement about this picture are ....
(Choose two correct answers)

• all the energy from the fire is transferred to the water

• energy is transferred from cooler object to the hotter object

• energy is transferred from the fire to the kettle

• some energy from the fire is transferred to the surrounding environment as light

Energy also can be converted into other energy.
The energy conversion in the lamp is ....

• from electrical into light only

• from electrical into heat only

• from electrical into sound only

• from electrical into light and heat energy