Light

Question 1

Energy

Answer 1

Is the ability to do work

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

Question 5

Non-Luminous

Answer 5

Objects that do not give off light, and need light , and need light to bounce off them for us to see them

Question 6

Speed of light is

Answer 6

300,000,000m/s

Question 7

Speed of sound in air is

Answer 7

340 m/s

Question 8

Light travels in straight lines

Answer 8

We show this by blocking light from a bulb with card

Question 9

Light does not travel around corners

Answer 9

Blocking the lights leads to shadows

Question 10

Solar eclipse

Answer 10

Occurs when the Moon passes between the sun and the Earth

Question 11

Lunar eclipse

Answer 11

Occurs when the Earth is between the Sun and the Moon , the Moon is in the Earth’s shadow

Question 12

Light

Answer 12

Is a form of energy