2.3 Using Sound Waves ม5

What is transported by a wave?

• air

• energy

• matter

• particles

Tags

NGSS.MS-PS4-1

Why does cupping your hands around your mouth when you shout make the sound travel further?

• To gain more energy

• Your voice gets louder

• Your voice becomes muffled.

• The sound doesn't spread as much.

What name is given to a collection of reflected sounds from the surfaces in a closed space

• intensity

• reverberation

• pitch

• loudness

After what period of time does the brain no longer retain a sound, allowing you to hear an echo?

• 0.0.1 sec

• 0.1 sec

• 1 sec

• 10 sec

Why is the school library covered with carpet?

• So everyone can make a lot of noise
• to help absorb sounds to keep it quiet
• because it looks good
• to help absorb sounds so it can stay noisy

Tags

NGSS.MS-PS4-2

What is Echolocation?

• The location of objects by reflected sound

• The location of sound source

• The sound of location interest

• The detection of sound in cave

Which animal does not use echolocation?

• Bat

• Dolphin

• Moth

• Human

For hearing distinct echoes, the minimum distance of the obstacle from the source of sound must be

• 18.9 m

• 17.1 m

• 34.4 m

• 21.6 m

An echo is an example of sound ________________ by a barrier.

• transmitted

• absorbed

• reflected

• amplitude

Why is there no sound in space?

• There is no material (medium) for the energy to travel through.

• The molecules in space are too small.

• Sound needs the correct temperature to travel through.

• Sound only travels through solid material.