Light

Question 1

Energy

Answer 1

Is the ability to do work I.e. Move.unit of energy is the joule.

Light can make things move

Question 2

Planet use of light

Answer 2

To make food.
(Photosynthesis)
Photo=light
Synthesis =to make

Question 3

Humans use of light

Answer 3

Solar panels

Crooke’s radiometer.

Question 4

Luminous and non-luminous

Answer 4

Object that give off light are called luminous object e.g. The sun,lightbulb switched on,lit candle.

Objects that don’t give off light,and need light to bounce off them for us to seen them are called non-luminous e.g.a book,my face,a table.

Question 5

Light travels

Answer 5

Do you hear thunder,or see lighting first?

Light travels really,really fast.

Speed of light is 300,000,000m/s

Speed of sound in air is 340 m/s

Question 6

Light travels in straight lines

Answer 6

We can show this by blocking light from a bulb with card

Light doesn’t travel around corners
Blocking light leads to shadows.

Question 7

Solar eclipse

Answer 7

A solar eclipse occurs when the moon passes between the sun and the Earth.

Question 8

Lunar eclipse

Answer 8

A lunar eclipse occurs when the Earth is between the sun and the Moon,the Moon is in the Earth’s shadow.

Question 9

Light

Answer 9

Is a form of energy.