4.8.1 Solar System; Stability Of Orbital Motions; Satelites

Question 1

Which Galaxy is our Solar System part of?

Answer 1

The Milky Way galaxy

Question 2

How many planets make up our solar system?

Answer 2

8 (plus dwarf planets)

Question 3

What do the planets in our solar system orbit around and what type of body is it?

Answer 3

• The planets orbit around the sun
• The sun is a star

Question 4

What type of force pulled together the cloud of dust and gas to form the Sun?

Answer 4

gravitational force of attraction

Question 5

What word is used to describe a ground of dust and gas?

Answer 5

A nebula

Question 6

What type of reactions take place at the start of a star’s life cycle as dust and gas is drawn together?

Answer 6

fusion reactions

Question 7

What factor determines the type of lifecycle a star undergoes?

Answer 7

The size of the star

Question 8

Which two phases do all stars of the same or greater size than the sun undergo?

Answer 8

• Protostar phase
• main sequence phase

Question 9

What do stars of a similar magnitude to the sun become at the end of their life-cycle?

Answer 9

A black dwarf

Question 10

Life cycle of solar mass star

Answer 10

Question 11

The life Cycle of a star much larger than our sun

Answer 11

Question 12

What two things can stars much bigger than the sun become at the end of their lifecycle?

Answer 12

• Neutron star
• Black hole