Our Changing Universe

Question 1

What does astronomical unit mean?

Answer 1

The distance from the Earth to the Sun

Question 2

What is a light year?

Answer 2

The distance light travels in a year

Question 3

Name 2 pieces of evidence that the universe is changing

Answer 3

Movement of the planets and other bodies
The lifecycle of stars
Redshift
Cosmic (Microwave) Background Radiation

Question 4

What was the Big Bang predicted to have happened?

Answer 4

13.7 billion years

Question 5

In the early stages of a stars life, what light element is formed?

Answer 5

Helium

Question 6

The stars that make up a galaxy are kept in the galaxy by the force of ________

Answer 6

Gravity

Question 7

Plasma cools down into _______

Answer 7

Gases

Question 8

Matter + anti-matter =

Answer 8

Energy

Question 9

Elements up to ____ are formed during the stable period of a star and elements heavier than ____ are formed in a _________

Answer 9

Iron
Iron
Supernova

Question 10

What does AU stand for?

Answer 10

Astronomical unit