Light

Question 1

Energy

Answer 1

Is the ability to do work I.e move. Unit of energy is the joule

Question 2

Plants 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

Answer 4

Objects that give off light are called luminous objects e.g the sun,lightbulb (switched on) and candle (lit)

Question 5

Non-luminous

Answer 5

Objects that do not give off light, and need light to bounce off them for us to see them are called non-luminous e.g a book, my face and a table

Question 6

Speed of light

Answer 6

Light travels at 300,000,000 m/s
Sound travels at 340m/s
So light is 1 million times faster than sound

Question 7

Light travels in straight lines

Answer 7

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

Question 8

Light does not travel around corners

Answer 8

Blocking light leads to shadows

Question 9

Solar eclipse

Answer 9

Is when the moon passes between the sun and the earth

Question 10

Lunar eclipse

Answer 10

Occurs when the earth is between the sun and the moon, the moon is in the earths shadow

Question 11

Light

Answer 11

Is a form of energy