Physics sound and space test

Question 1

What is sound?

Answer 1

sound is a form of energy that is produced by vibration and travels as a longitudinal wave.

Question 2

What is amplitude?

Answer 2

The amplitude is seen as the height of the wave and defines how loud a sound is on a sound wave.

Question 3

What is wave length?

Answer 3

The distance between 2 waves is known as the wavelength.

Question 4

Where is the crest?

Answer 4

the crest is found at the peak of a sound wave

Question 5

The higher the frequency, the higher the …

Answer 5

Pitch

Question 6

The higher the amplitude the higher the…

Answer 6

Sound/ Loudness

Question 7

What is a transverse wave?

Answer 7

This is a wave that travels away from the source at right angles to the movement of the source. they move up and down

Question 8

What is a longitudinal wave?

Answer 8

This is a wave that travels parallel from the source.

Question 9

What type of wave is a sound wave?

Answer 9

Longitudinal.

Question 10

Can sound travel through a vacuum?

Answer 10

No, Bcoz there is no medium to travel through.

Question 11

What is a compression?

Answer 11

An area with high pressure.

Question 12

What is a rarefaction?

Answer 12

An area with low pressure.

Question 13

What causes sound waves?

Answer 13

Vibrations

Question 14

What is frequency?

Answer 14

The number of complete waves or vibrations.

Question 15

What is interference?

Answer 15

The effect produced by 2 waves meeting each other. it can only happen when the waves are the same types.

Question 16

What is constructive interference?

Answer 16

When 2 waves interfere together to form a bigger wave [Reinforce]

Question 17

What is destructive interference?

Answer 17

When 2 waves interfere together to cancel each other out [Cancel]

Question 18

What does reinforce mean?

Answer 18

To make stronger.

Question 19

Describe the capture theory.

Answer 19

In the early solar system, a large object was captured by earth’s gravitational field.

Question 20

Describe the fission theory.

Answer 20

The earth was spinning so fast that a bulge of it was thrown off to form the moon.

Question 21

Describe the Co-acceleration or simultaneous formation of the moon.

Answer 21

The earth and the moon were formed at the same time.

Question 22

Describe the impact theory.

Answer 22

A large asteroid hit the earth and rocks by the impact were launched up into orbit.

Question 23

What is a Nebula?

Answer 23

A stellar nursery- a region of clouds of dust and gas. This is where stars are born.

Question 24

What is the closest nebula.

Answer 24

Orion nebula (M42)

Question 25

How is a Red giant formed?

Answer 25

When a star begins to run out of hydrogen and helium its layers begin to expand and become less bright.

Question 26

The continents were once connected together to form a larger continent called Pangea. What evidence can you use to prove this theory correct?

Answer 26

1. Study of fossils: similar fossils are found on different continents. this could show that they were once joined or close together.
2. Pattern of rocks: Similar patterns of rock layer on different continents could show that they were once close together or joined.
3. Shape of continent. shape of continents fit together like a jigsaw puzzle.

Question 27

Why did Pangea break apart?

Answer 27

Because of convection currents under the crust pulling pieces of the large continent away.