8.1 - Solar System

Which galaxy is the solar system a part of?

Milky Way

How many planets make up our solar system?

8+ some dwarf planets

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

Planets orbit the sun and the sun is a star

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

Gravitational force of attraction

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

A nebula

What type of reactions take place at the start of a stars life cycle as Dust and gases drawn together?

Fusion reactions

What factor determines the type of life-cycle a star undergoes?

The size of the star

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

Pro star phase

Main sequence phase

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

A black dwarf

What two things can stars much bigger than the Sun become at the end of their life cycle?

Neutron star

Black hole

What two phases do stars of similar size to the Sun go through between being a main sequence star and a black dwarf

Red a giant 

white dwarf

What two phases do stars of greater size than the Sun go through between being a main sequence star and a neutron star?

Red supergiant

Supernova

What are produced during the fusion processes in a star?

All of the naturally occurring elements

What condition is required for fusion reactions to occur in star?

Very high temperatures

How are elements heavier than iron produced?

In a supernova

What type of nuclear fuse together to form heavier element elements in a star?

Hydrogen nuclei used to form heavier elements

How are elements distributed throughout the universe

Through the explosion of a massive star(supernova)

What allows planets and satellites to maintain circular orbits?

Gravity provides the gravitational force that act as the objects centripetal force

The presence of a century petal force allows for the object to maintain it circular orbit

What type of satellite can a planet moon be described as?

A natural satellite

Two examples of artificial satellites

TV satellites

Satellites used for satellite imaging

Explain why for stable orbit the radius of orbit must change if the speed changes

At high speeds, the object requires a greater centripetal force

For a greater centripetal force the gravitational force must increase

This is achieved by the radius of the orbit being reduced

Explain how the force of gravity acting on a satellite affected speed and velocity

The force can alter its velocity since the direction is continually changing it

It can't cause a change of speed since there is no force component in the direction of motion