Science – Unit 2 Unit 2 – Energy Week 2 November 15-19, 2010

How high or low a sound is. pitch

To quickly move back and forth. vibration

The loudness or softness of a sound. volume

A sound bouncing back from an object. echo

To take in. absorption

To bounce back. reflection

If an object vibrates slowly, it will make a __________ sound. low

Sound travels through __________. matter

Which of the following sounds could cause possible eardrum damage? Singing birds Jet plane taking off Window air conditioner jet plane taking off

Sound waves travel slowest through which form of matter? Solid Liquid Mud Gas gas

Sound is another kind of __________. energy

Sound waves travel fastest through which form of matter? Solid Liquid Gas Balloons solid

Which sound takes more energy to produce? Soft Sound Happy Sound Sad Sound Loud Sound loud sound

Which is not a way that sounds help wild animals stay alive? To keep warm To find food To warn one another of danger to keep warm

Which of the following loud sounds can keep you safe? Jackhammer Loud music Siren on an ambulance Birds singing siren on an ambulance

Dark-colored or dull objects absorb a lot of light which causes these objects to become __________. warmer

Name two animals that use echoes to find food. bats and dolphins

If you were going for a walk in the desert, would you rather wear black or white clothing? Why? White because it reflects light.

The ability to cause change. Energy

Heat that is produced in an engine but is not used for any purpose. waste heat

Electricity moves from a battery through wires to a bulb, and then back to the battery in a __________. circuit

When a bell makes the air __________, sound is produced. vibrate

The energy of motion. kinetic energy