Science Test 4 - Physics

Question 1

What are the two types of waves?

Answer 1

Mechanical waves and electromagnetic waves.

Question 2

What are mechanical waves + example?

Answer 2

Require a medium, e.g. waterwaves, soundwaves.

Question 3

What is the wavelength?

Answer 3

The distance between any two identical points on a wave?

Question 4

What is the acronym for the electromagnetic spectrum?

Answer 4

Red monkeys in vans use x-ray glasses.

Question 5

What are transverse waves?

Answer 5

The particles vibrate perpendicular to the direction of energy (Up and down).

Question 6

What are longitudinal waves?

Answer 6

The particles vibrate in the same direction as enery movement (side to side).

Question 7

What is the amplitude?

Answer 7

The maximum distance from the midpoint of the wave.

Question 8

What are all the types of waves in the electromagnetic spectrum?

Answer 8

Radio waves, microwaves, infrared, visible, ultra violet, x-ray, gamma waves.

Question 9

What is a vaccuum?

Answer 9

An area with no particles.

Question 10

What is a medium?

Answer 10

A medium is the thing that a wave travels through.

Question 11

If the particles aren’t moving in the wave, then what are they doing?

Answer 11

The particles move up or down or side to side.

Question 12

What are electromagnetic waves+example/?

Answer 12

Do not require a medium, e.g. lightwaves.

Question 13

Do shorter wavelengths have lower or higher frequencies?

Answer 13

HIgher frequencies.

Question 14

What happens if an object is translucent?

Answer 14

Only some of the light will be transmitted

Question 15

What happens if an object is transparent?

Answer 15

The light will mostly be transmitted through the object.

Question 16

What do waves transport and not transport?

Answer 16

Waves transport energy, but they do not transfer the matter/particles.

Question 17

Where do waves come from?

Answer 17

All waves come from vibrations.

Question 18

Increased amplitude = …
Decreased amplitude = … (in light waves)

Answer 18

Brighter
Darker/Dimmer

Question 19

What are electromagnetic waves and do they require a medium?

Answer 19

Electromagnetic waves are transverse waves that carry radiation energy, do not require a medium.

Question 20

What is the frequency?

Answer 20

How many waves per second

Question 21

Luminous

Answer 21

Makes their own light

Question 22

What happens if an object is opaque?

Answer 22

No light can be transmitted.

Question 23

Diverge + example

Answer 23

Light rays can diverge, meaning spread out e.g. flashlight

Question 24

Non-luminous

Answer 24

Objects are only seen by the lights they reflect

Question 25

When does reflection occur?

Answer 25

When light hits a smooth surface

Question 26

What happens when an object absorbs light energy?

Answer 26

It is transformed into heat energy. Therefore, the more light energy absorbed the hotter an object gets.

Question 27

What is the slowest thing light travels in?

Answer 27

Diamond (Most dense)

Question 28

When does diffuse reflection occur?

Answer 28

When light rays hits a rough surface

Question 29

Does light travel faster in a more or less dense medium?

Answer 29

Less dense

Question 30

What are waves?

Answer 30

Waves are the movement of energy which is caused by vibration.

Question 31

What is the law of reflection?

Answer 31

A light ray coming in will always be reflected at the same angle on the other side.

Question 32

Converge

Answer 32

Light rays can converge, meaning come together e.g. human eye

Question 33

What is the angle of incidence?

Answer 33

The angle of which light enters.

Question 34

What do frequency and wavelength effect for light?

Answer 34

Colour

Question 35

What is frequency related to in sound waves?

Answer 35

Pitch - Higher frequency, higher pitch of the sound

Question 36

What is the measure for amplitude?

Answer 36

Decibels (dB)

Question 37

What does amplitude for light effect?

Answer 37

Brightness

Question 38

Any sound waves below human hearing are called ...

Answer 38

Infrasound

Question 39

What are factors effecting the speed of sound?

Answer 39

Quality of material and the temperature of the material

Question 40

When light strikes a boundary the light can be....

Answer 40

Reflected, transmitted, absorbed, scattered

Question 41

What is refraction?

Answer 41

When a wave travels into a new medium and the speed changes, the wave changes direction which is refraction.

Question 42

Is the refraction towards the normal in a slower or faster medium?

Answer 42

Slower

Question 43

Is the refraction away from the normal in a slower or faster medium?

Answer 43

Faster

Question 44

What is the fastest thing light travels in?

Answer 44

Air/vacuum (Least dense)

Question 45

Are sound wave longtudinal or transverse?

Answer 45

Longtudinal

Question 46

What is the amplitude related to in sound waves?

Answer 46

Loudness - Greater amplitude, louder sound

Question 47

Any sound waves above human hearing are called ...

Answer 47

Ultrasound

Question 48

How do you work out the speed of something?

Answer 48

Speed = Distance/Time

Question 49

Sound can be like light waves in the sense that...

Answer 49

Sound can be transmitted through materials, sound can be absorbed by materials and converted to heat, sound can be reflected and change direction when moving.

Question 50

What are echoes?

Answer 50

When hard surfaces reflect sound waves.

Question 51

What is the use of sonar?

Answer 51

The time difference between sending and receiving sound.

Question 52

What is the speed of sound in air?

Answer 52

340m/s