Question 1

Are sound waves transverse or longitudinal?

Accepted Answer

longitudinal

Answer

transverse

Question 2

Why are sound waves mechanical?

Accepted Answer

need a substance to travel through

Answer

the wave moves by areas of compression and rarefaction

Answer

the vibrations/oscillations of sound waves are parallel to their motion

Answer

particles do not travel along the waves

Question 3

What do sound waves do to the eardrum and other solid parts of the human ear?

Accepted Answer

make them vibrate

Answer

make them expand

Answer

make them release hormones

Answer

make them hear sound

Question 4

What is the frequency range of normal human hearing?

Accepted Answer

$	ext{20Hz to 20 000 Hz (20 kHz)}$

Answer

$	ext{3 Hz to 3000 Hz (3 kHz)}$

Answer

$	ext{20Hz to 2000 Hz (2 kHz)}$

Answer

$	ext{30 Hz to 30 000 Hz (30 kHz)}$

Question 5

Why is there a limit to the range of human hearing?

Accepted Answer

sound waves in the air can only be converted to vibrations in the ear over a limited range of frequencies

Answer

sound waves in the air can only be converted to thermal signals in the ear over a short range of frequencies

Answer

sound waves in the air can only be converted to electromagnetic waves in the ear over a limited range of amplitudes

Answer

human ears only vibrate in response to ultrasound wave signals

Question 6

What are ultrasound waves?

Accepted Answer

sound waves with a frequency above $	ext{20 000 Hz}$

Answer

sound waves with a very high amplitude

Answer

sound waves with a frequency above $	ext{2000 Hz}$

Answer

sound waves with a long wavelength

Question 7

What happens to ultrasound waves when they meet a boundary between two substances?

Accepted Answer

they are partially reflected and some are transmitted

Answer

they are absorbed and partially emitted

Answer

they are absorbed

Answer

they are all reflected

Question 8

Which of these is NOT a use of echo sounding?

Accepted Answer

ultrasound imaging of a developing foetus

Answer

as part of SONAR systems

Answer

measuring the depth of water

Answer

detecting objects in deep water

Question 9

Are P-waves longitudinal or transverse?

Accepted Answer

longitudinal

Answer

transverse

Question 10

Which of these is a property of P-waves?

Accepted Answer

travel through liquids and solids

Answer

they are electromagnetic waves

Answer

cannot travel through liquids

Answer

vibrations/oscillation are perpendicular to the movement of the wave

Question 11

Are S-waves longitudinal or transverse?

Accepted Answer

transverse

Answer

longitudinal

Question 12

Which of these is a property of S-waves?

Accepted Answer

cannot travel through liquids

Answer

they are electromagnetic waves

Answer

waves travel by compression and rarefaction

Answer

travel through liquids and solids

Question 13

Which observation suggests that the outer core of the Earth's' structure must be liquid?

Accepted Answer

S-waves are not detected on the opposite side of the earth as they cannot travel through liquids

Answer

echo sounding signals are reflected by the sea bed

Answer

P-waves are detected on the opposite side of the earth as they can travel through liquids

Answer

seismic waves can carry energy through the Earth's' layers

Question 14

Lenses can be concave or convex. Which type of bulges out at the middle?

Accepted Answer

convex

Answer

concave

Question 15

Lenses can be concave or convex. Which type of lens is thinner in the middle than at the edges?

Accepted Answer

concave

Answer

convex

Question 16

Which type of lens converges (brings together) parallel rays of light at the principal focus ?

Accepted Answer

convex

Answer

concave

Question 17

Which type of lens diverges (spreads out) parallel rays of light so they appear to have come from the principal focus?

Accepted Answer

concave

Answer

convex

Question 18

What term is used to describe the distance from the centre of the lens to the principal focus?

Accepted Answer

focallength

Question 19

Which type of lens produces only a virtual image?

Accepted Answer

concave

Answer

convex

Question 20

Which type of lens can produce a real or virtual image?

Accepted Answer

convex

Answer

concave

Question 21

What properties do all Visible Light EM waves of the same colour share?

Accepted Answer

same range of wavelengths and frequencies

Answer

same range of wavelengths and wave heights

Answer

same range of wavelengths and amplitudes

Answer

same wave peaks and range of frequencies

Question 22

Visible light can be reflected by objects. Which of these things is NOT something that happens to light when it hits an object?

Accepted Answer

emitted

Answer

absorbed

Answer

refracted

Answer

transmitted

Question 23

What term is used to describe the reflection from a smooth surface?

Accepted Answer

specular reflection

Answer

smooth reflection

Answer

diffuse reflection

Answer

full reflection

Question 24

What term is used to describe the reflection from a reflection from rough surface?

Accepted Answer

diffuse reflection

Answer

specular reflection

Answer

partial reflection

Answer

rough reflection

Question 25

What terms describe an object that transmits visible light?

Accepted Answer

transparent or translucent

Answer

opaque

Answer

see-through

Answer

transparent only

Question 26

What is the name for an object that does not transmit visible light but instead absorbs and reflects it?

Accepted Answer

opaque

Answer

translucent

Answer

black

Answer

solid

Question 27

How do colour filters work?

Accepted Answer

colour filters absorb certain wavelengths of light and transmit the others

Answer

colour filters absorb certain wavelengths of light and emit the others

Answer

colour filters refract certain wavelengths of light and emit the others

Answer

colour filters reflect certain wavelengths of light and transmit the others

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