4.8.1 Solar system (will come up) P2 Flashcards
(22 cards)
Which galaxy is our solar system part of
The milk way galaxy
How many planets make up our solar system
8 (and dwarfs)
What do the planets in our solar system orbit around and what type of body is it
Around the sun
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 gas is drawn together
Fusion reactions
What factor determines the type of lifecycle a star undergoes
The size of the star
Which 2 phases do all stars of the same or greater size than the sun undergo
Protostar 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 2 thins can stars much bigger than the sun become at the end of their lifecycle
Neutron star
Black hole
What 2 phases do stars of similar size to the sun go through between being a main sequence star and a black dwarf
Red giant
White dwarf
What 2 phases do stars of greater size than the sun go through between being a main sequence star and a neutron star/black hole
Red super giant
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 a star
Very high temperatures
How are elements heavier than iron produced
In a supernova
What type of nuclei fuse together to form heavier elements in a star
Hydrogen nuclei fuse 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 produces the gravitational force that acts as the objects centripetal force
The presence of a centripetal force allows for the object to maintain its circular orbit
What type of satellite can a planets moon be described as
A natural satellite
2 examples of artificial satellites
TV satellites
Satellites used for satellite imaging
Explain why for a stable orbit, the radius of orbit must change if the speed changes
At higher 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 affects its speed and velocity
The force can alter its velocity since the direction is continually changing
It cant cause a change of speed since there is no force component in the direction of motion
