P5: Waves In Matter

Question 1

Define a wave

Answer 1

A wave is an oscillation that transfers energy

Question 2

What waves are used to communicate between 2 phones

Answer 2

Electromagnetic waves

Question 3

What kind of waves are sound and water waves?

Answer 3

Mechanical waves and need matter to travel through

Question 4

Sound waves are _______

Answer 4

Sound waves are longitudinal

Question 5

In traverse waves…

Answer 5

The direction of vibration is at right angles to the direction of the wave

Question 6

Define amplitude

Answer 6

Symbol: A
Distance from the middle to the top (crest) or bottom (trough) of a wave

Question 7

Define Wavelength

Answer 7

Distance from one point on a wave to the same point on the next wave

Question 8

Define Frequency

Answer 8

Number of waves, or oscillations per second

Question 9

Define time period

Answer 9

The time for one wave to pass a given point

Question 10

Waves also have ________

Answer 10

Waves also have wave velocity

Question 11

You can find the wavelength by using…

Answer 11

Finding the number of rotations of the motor per second

Question 12

How do you measure the velocity of sound?

Answer 12

If you time how long it takes to hear an echo of a clap when you are at a distance from a wall you can work out the velocity of sound.

Question 13

Why can the velocity of sound vary from different factors?

Answer 13

Disturbance in the wave is transferred between the particles

Question 14

What can velocity of sound vary from?

Answer 14

Temperature and Pressure

Question 15

How many wave types are in electromagnetic spectrum ?

Answer 15

7

Question 16

What is the first wave type in the electromagnetic spectrum?

Answer 16

Radio waves

Question 17

What is the second wave type in the electromagnetic spectrum?

Answer 17

Micro-waves

Question 18

What is the third wave type in the electromagnetic spectrum?

Answer 18

Infra-red

Question 19

What is the fourth wave type in the electromagnetic spectrum?

Answer 19

Visible light: only type that humans can see

Question 20

What is the fifth wave type in the electromagnetic spectrum?

Answer 20

Ultra violet

Question 21

What is the sixth wave type in the electromagnetic spectrum?

Answer 21

X-rays

Question 22

What is the last wave type in the electromagnetic spectrum?

Answer 22

Gamma rays

Question 23

Electromagnetic waves consist of 1.___________ and 2.___________

Answer 23

1. Oscillating electric
2. Magnetic fields

Question 24

Sources like microwaves emit..

Answer 24

Electromagnetic waves

Question 25

Your skin absorbs _____ waves

Answer 25

Infrared

Question 26

What kind of radiation cooks food in a grill/oven

Answer 26

Infrared

Question 27

What can ultraviolet radiation help with

Answer 27

• Vitamin D
• identify forged bank notes

Question 28

Which 3 wave types can damage or kill cells?

Answer 28

Ultraviolet, X-rays, Gamma Rays

Question 29

Which radiation kills bacteria in water

Answer 29

Ultraviolet

Question 30

Which radiation can kill skin cancer or other cancer cells

Answer 30

X-rays

Question 31

Which radiation can kill cancer cells and also kill bacteria on food

Answer 31

Gamma rays

Question 32

How can ultraviolet radiation cause damage to us?

Answer 32

Damage the DNA in the cells of our skin, causing skin cancer

Question 33

Overuse in x rays can cause…

Answer 33

Damage to cells and cancer

Question 34

Gamma rays can also….

Answer 34

damage or kill the cells in your body