Soace And Beyond Flashcards
(37 cards)
Which culture/country had a belief that the Earth was at the center of the Solar System?
Greece
Which culture/country believed that a flat earth was supported by 12 pillars?
India
Which culture/country believed that the earth was supported on the back of a turtle?
Thailand
What was the Geocentric model?
The Geocentric model was a theory of the earth being in the middle of the universe and that the Sun, moon, lanets and stars moved around the earth.
What was the heliocentric model?
The heliocentric model was the idea that the planets orbited the Sun.
What does the current model state?
Our current model of the Universe says that our planets orbit around our
sun, and that our solar system is a small part of our galaxy, which isn’t in
the centre of the Universe.
What does the Big Bang Theory state?
The theory states that to begin with all the matter in the universe
was concentrated into a single incredibly tiny point.
This began to enlarge rapidly in a hot explosion (called the Big
Bang). The Universe is still expanding today.
What is an anology?
An analogy is a comparison between two things that helps you to explain what one of them is.
What can be predicted from the Big Bang theory avout the size of the Universe?
That the universe will always expand and continue to get larger and that in fact it was extremely tiny at one point. It is constantly expanding.
How are atoms of the element Helium formed in a star?
Stars such as the sun fuse hydrogen nuclei into helium and similar small nuclei.
How were atoms of very heavy elements formed?
Atoms of very heavy elements are formed when a supernova occurs. When it occurs, it fuses smaller nucleis and makes bigger nucleis such as gold.
How and when atoms of different elements may be distributed throughout the Universe?
Due to explosion of stars, when they die, the different elements get distributed around a large area.
Name some uses of satellites
Communication, internet, forecasting, broadcasting, navigation, mapping
How does a satellite stay in orbit?
A satellite maintains in orbit by balancing two factors : its velocity and the gravitational pull that the Earth has on it.
What is a Geostationary satellite?
A satellite that stays above the same point on the earth and its orbit time is 24 hours
What is a Low Polar orbit satellite?
It has a low orbit around the earth passing over the North and South poles. The orbit tume of this satellite is anything less than 24 hours.
What is a Low earth orbit satellite?
This satellite is 1000km above the earth and its orbit time is 90 mins to 2 hours.
Risk Assessment
A document that describes how you reduce a risk.
Hazard
The potential source of harm.
Ethics
A moral decision of what is right and of what is wrong.
Biased
Showing only one side of information, or taking things out of context.
State two factors that you need to consider when you do a risk assessment.
The probability of something happening and the consequences of it.
What are the risks of space missions?
You could explode, solar flare could occur, the reliance on parachutes to descend, and as they travel back, the spacecraft gets very, very hot due to friction.
What is Solar flare? And state one risk of it.
Solar flare is a process that produces a large amount of radiation emitted from the Sun. On risk is a solar flare can stop all the on-board computers working.
