Devices & Energy

We use fuel to .........................

• Cook food

• operate devices

• do exercises

• All the previous

The energy input to operate fan is ...................... energy

• Electric

• Kinetic

• Sound

• Heat

The energy output from washing machine is .................... energy

• Light

• Kinetic

• Electric

• magnetic

Energy chains start with .....................

• Sun

• Plants

• Water

Green plants change light energy coming from the Sun to ..................... energy

• Sound

• Light

• Magnetic

• Chemical

When we burn wood .................. energy is produced

• Heat

• Chemical

• Sound

We built dams to generate Hydroelectric energy

• True

• False

In hair dryer , Chemical energy changes into Heat & Sound energies

• True

• False

We can use ................... to operate robots that discover other planets

• Solar energy

• Long last batteries

• Electric energy

• Solar energy & Long last batteries

Energy output in soap dispenser is ................ energy

• Kinetic

• Electric

• Light

• Heat