Which of the following is the unit for measuring loudness of sounds?

• Decibel

• Volt

• Joule

• Meter

How are sounds made?

• Sounds are made when objects vibrate.

• Sounds are made when objects in vacuum room.

• Sounds are made when objects stay still.

• Sounds are made when objects stop moving.

Tags

NGSS.MS-PS4-1

Look at the experiment shown.

What happens to the end of the ruler if you flick the free end of the ruler?

• It vibrates.

• It stay still.

• It become longer.

• It become shorter.

Tags

NGSS.MS-PS4-1

Look at the experiment shown.

Aldi hits the tuning fork on the rubber object and place it at the surface of the water. What will happen to the surface of water?

• The surface of water will vibrate.

• The surface of water will stay still.

• The surface of water will be smooth.

• The surface of water will be warm.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

How does sound travel best?

• through a solid

• through the liquid

• through the air

• through the vacuum

Tags

NGSS.MS-PS4-2

What is volume?

• How high or low a sounds is

• How loud or soft sound is

• Reflected sound that comes back and is repeated

• The movement back and forth

Why can't we hear sound in space?

• because space has no living thing and therefore no sound.

• because space has no air to vibrate and therefore no sound.

• because space has no materials and therefore no sound.

• because space has no music instrument and therefore no sound.

When we talk or singing, our ____________ vibrate and make sound.

• vocal cords

• tongue

• head

• ears

Tags

NGSS.MS-PS4-1

Why do we see lightning before we hear the thunder?

• Lightning is an illusion.

• Light travels faster than sound.

• Sound travels faster than light.

• Lightning vibrate vaster than sound.

What do sound waves travel slowest through?

• Air

• Metal

• Water

• Solids

Tags

NGSS.MS-PS4-2