The Universe Flashcards
What does retrograde motion mean
The apparent motion of planets going backwards in their orbits
Where does the geocentric model come from
Greece
Where does the myth of the earth on the back of a tortoise
India
Where does the myth of the sun being swallowed by god when an eclipse happens
Thailand
Describe the geocentric model
The geocentric model is where all the planets, moon and the sun revolve and orbit around the earth which is in the centre
Did the geocentric model explain retrograde motion
No it didn’t
Who provided evidence for the HELIOCENTRIC model
Galileo
Explain why Galileo observations could not be explained using the geocentric model
Galileo saw objects orbit around Jupiter and not the earth which proved that showed the earth could not be in the centre
Describe the heliocentric model
Where the planets orbit the sun, It is the current model tha we use today
Order these events starting with the earliest- first living things, formation of the solar system, Big Bang, dinosaurs died out
Big Bang
Solar system formed
First living thing
Dinosaurs died out
What is meant by the Big Bang
All of space and time expanded from something smaller than an atom, Big Bang explains why galaxies are moving apart and why galaxies are further away are moving faster. Big Bang is the beginning of everything and how the world was created.
How do satellites get into orbit
They launch a satellite by attaching it to a rocket. Fuel burns inside the rocket and pushes the waste out the bottom. (This push is a part of an interaction pair) There is a force of the rocket on gases and force of gases on the rocket. There is also a force between the rocket and earth when the force of the air on the rocket is bigger than the force of the earth on the rocket, it will take off
What is a risk
A risk is a danger associated with an action of doing or having something
What is a benefit
A benefit is good positive thing that comes from an action
What are 3 safety precautions you should take before handling radioactive substances
Protective clothing
Don’t come into direct contact with it
Don’t use it for a long period of time
If you can’t run away, hide from it the source your hiding behind can absorb the radioactive particles
