Astronomy/ The Universe

Question 1

What is the Big Bang Theory? Explain.

Answer 1

A thoery which explains how the Universe was formed.
A region of energy exploded outward. Matter was later formed from this energy. Matter condensed into starts because of gravity.

Question 2

When light from distant stars are moving away from Earth, what does it produce?

Answer 2

A ‘red shift’ in the light coming from the stars.

Question 3

What did Edward Hubble discover?

Answer 3

The universe is expanding.

Question 4

What did planets form from?

Answer 4

Stardust

Question 5

What do stars form from?

Answer 5

Stardust and gases collected by gravity.

Question 6

What are distances in space measured in?

Answer 6

Light years

Question 7

What is a light year?

Answer 7

Distance light travels in one year.

Question 8

How fast does light travel per second through space?

Answer 8

300 000km/ sec

Question 9

What radiation do stars release?

Answer 9

Electromagnetic radiation, which include gamma rays, X- rays, U.V, light, infra- red, microwaves and radiowaves.

Question 10

What does nuclear fusion in the star’s core do?

Answer 10

Converts hydrogen fuel into helium and heavier elements.

Question 11

What surface temperature does a blue/ white star have?

Answer 11

20 000 degrees Celsuis

Question 12

What surface temperature does a yellow star have?

Answer 12

5000 degrees Celsuis (e.g. our Sun)

Question 13

What surface temperature does a red star have?

Answer 13

3000 degrees Celsuis

Question 14

How can the elements in a star by determined?

Answer 14

By studying the light spectrum they give off.

Question 15

Describe the life of stars.

Answer 15

Refer to science book :D

Question 16

What does a black hole result from?

Answer 16

The death of a massive star that produces a supernova explosion. The core fo the star collpases inward creating a black hole. The matter is very dense with enormous gravity pull.

Question 17

What is a galaxy?

Answer 17

A cluster of stars in the universe.