Science and Sound

Which of these sounds can you hear in the early part of Dr Binocs video (Video 2)?

• Hammering a nail.

• Birds chirping.

• People singing.

• Car honking.

Which range of frequencies can be heard by the human ear?

• 20 - 20 000 Hz

• 10 - 10 000 Hz

• 20 - 200 000 Hz

• 20 - 50 000 Hz

In what medium, we cannot hear sound?

• Vacuum

• Solid

• Liquid

• Gas

Sounds are made out of _______________.

• Vibrations

• Rotations

• Music

• speakers

We hear sounds with our _______________.

• ear

• eye

• nose

• hair

Which part of the ear receives vibration?

• ear drum

• ear lobe

• ear hairs

• ear mole

Sound is a type of _______________.

• energy

• radio

• shoes

• food

If there is more energy in the vibration, the sound will be _______________.

• loud

• quiet

• higher

• lower

Sounds travels _______________ in solids than in gas.

• faster

• slower

• more

• less