Which material does sound travel fastest in?
Wood
Air
Metal
Soft tissue
Vacuum
Cork
Why does sound move faster in metal than in air?
The particles are closer together in a solid than in a gas
The particles are further apart in a solid than in a gas
It doesn't travel faster in metal than in air
The particles have more energy and therefore can vibrate faster
What range of the frequency of aa sound can humans hear?
20 - 2,000 Hz
20 - 20,000 Hz
20- 2,000,000 Hz
20 - 200,000 Hz
What is the name of the purple part of the ear?
Ear canal
Ear drum
Outer ear
Cochlea
Ossicles
Eustachian Tube
Is - vocal chords, air, ear drum, cochlea, cochlea hairs, ossicles - the correct order in which you hear a sound?
What are the names of the three ossicles
Hammer
Anvil
Stirrup
Cochlea hairs
Middle ear
What is the left arrow showing?
Rarefraction
Compression
Which of the following describes Frequency?
The height of the wave from the black line
The number of waves travelling past a point (Hertz)
The distance between two identical points on the curve
Which of the following are good conductors of heat?
Bubble wrap
Tin foil
Steel
Iron
Felt
An insulator is a material that doesn't conduct heat well.
What is this diagram showing?
Conduction
Convection
Radiation
Which of the following are true about Infrared rays?
They can travel through a vacuum
They can travel through opaque materials
They can be reflected
They travel at 300,000,000 m/s
They travel at 30,000,000 m/s
What would you use to insulate a backer of water?
Conductors
Insulators
Both
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