science - light and waves

Question 1

what is an example of a longitudinal wave?

Answer 1

sound, seizmik , earthquake

Question 2

what is example of a transverse wave?

Answer 2

light, water, oceans

Question 3

State one difference between longitudinal and transverse waves?

Answer 3

Oscillation or vibration at right angles or perpendicular to direction of travel owtte
Transverse has crests / troughs
Longitudinal has compressions and spreading out / rarefactions

Question 4

what is a wave?

Answer 4

a disturbance that moves energy from one place to another.

Question 5

what is refraction caused by?

Answer 5

Refraction is caused by light changing speed as it passes from one medium into another

Question 6

Name the labelled parts of the eye in the list below the following diagram:

Answer 6

One mark for each correct
1) Pupil
2) Iris
3) Sclera
4) Cornea
5) Lens
6)Retina
7)Optic nerve

Question 7

Name one similarity and one difference between the structure of a camera and the structure of the eye.

Answer 7

Similarity: Any one from: Both have a lens / aperture / light sensitive area / tough case
Difference: Any one from: Eye has no shutter / eye has single lens only / eye auto cleans (or converse - camera has