waves

Question 1

What state of matter does sound travel fastest through.

Answer 1

Solids - densely packed particles

Question 2

What state of matter does sound travel slowest through?

Answer 2

Gas - very spread out particles making it difficult

Question 3

Lowest section on EM spectrum.

Answer 3

Radio waves

Question 4

Radio wave uses.

Answer 4

Communication e.g radio, TV, broadcasting

Question 5

Microwaves uses

Answer 5

Heating up things, TV, mobile phones

Question 6

Infrared (IR) energy uses

Answer 6

Thermal imaging, heating things up

Question 7

Light uses.

Answer 7

Seeing

Question 8

Ultraviolet (UV) energy uses

Answer 8

Sterilisation, solar panels, tanning/solariums

Question 9

X-Ray uses

Answer 9

Bone imaging, airport security

Question 10

Gamma ray uses

Answer 10

Sterilisation, killing cancer cells, diagnosis of internal diseases

Question 11

In order all the EM spectrum

Answer 11

Radio
Microwaves
Infrared 
Light
Ultraviolet 
X-ray 
Gamma

Question 12

What is refraction?

Answer 12

Bending of light by it passing through glass from the air or when light changes to a medium of a different density

Question 13

What is reflection?

Answer 13

When a light ray hits a surface it cannot pass through and bounces off that surface at an angle (known as the angle of reflection).

Question 14

What is absorption?

Answer 14

When light rays, a colour, or colours are absorbed by a substance when it hits the substance.