Ujian Tengah Semester Sains

How is sound made?

• By light traveling in waves

• By objects vibrating

• By air stopping

• By water moving

What is the state of matter that allows sound to travel the fastest?

• Gas

• Solid

• Liquid

• Plasma

Why does sound travel faster in solids than in gases?

• Solids have more space between their particles.

• Solids have tightly packed particles.

• Gases are heavier.

• Liquids are softer.

What do bats use to help them navigate at night?

• Their eyes

• Sound

• Their tails

• Their sense of smell

What is the medium through which sound cannot travel?

• Water

• Air

• Solid objects

• A vacuum

How does sound from a bell reach your ears?

• The bell moves toward you.

• The air particles vibrate and carry the sound.

• The bell creates wind.

• The bell changes color.

What does pitch depend on?

• The color of the object

• The speed of the vibrations

• The size of the object

• The amount of light

Which sound has the highest pitch?

• A big drum

• A small bird singing

• A car engine

• A thunderstorm

How can we increase the pitch of a string instrument?

• Use a thicker string

• Shorten the string

• Make the string looser

• Cover the instrument

What does volume depend on?

• The strength of the vibrations

• The temperature of the air

• The color of the object

• The time of day