P1 Unit 3: Waves and the Universe

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  • Created by: nicola
  • Created on: 17-04-15 07:43
What is the universe make of?
The solar system consits of eight planets, monns and the Sun (which is a star). The solar system is part of the Milky Way galaxy. Galaxy is a collection of stars. The universe includes all galaxies.
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What are the size of object in increasing order?
Asteroids/Comets, Moons, Planets, Stars, Solar System, Galaxies and The Universe.
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What is the distances between objects in increasing order?
Planets to Moon, Planet to next Planets, Planets to Sun, Distances across the Solar System, Star to Star, Distances across a Galaxy, Galaxy to Galaxy, Distances across the Universe.
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What does SETI stand for?
Search for Extra Terrestrial Intelligence.
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What is the method for gathering the edidence for life beyond Earth?
Spaces probes - take close up photos and sample atmosphere around planets. Landers and rovers - photos of the surface and analysis of soil and rock samples. Radio telescopes - search for radio signals from intelligent life.
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What are the advantages of modern telescopes?
Can detect waves from all different parts of the electromagnetic spectrum, have greater magnification and are very sensitive so can gather huge amounts of data from distant stars and objects that emit other types of electromagnetic waves.
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What are space telescopes?
The atmosphere absorb and stops some types of electromagnetic waves reaching the Earth's surface. So puting telescopes in space above the atmsphere allows them from detect all different electromagnetic waves from space without any interference.
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what is a spectrometers?
Spectrometers can be used to split light from stars and galaxies into a specctrum. By analysing the spectrum scientist can identify what the star is made of and whether the star is moving towards or awya from us.
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What is the big bang theory?
The universe started in an explosion from a single point (14 billion years ago). The universe is explaning. The mass in the universe remains constant (no new matter is being created). The way the universe will end is uncertain.
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What evidence is their for the big bang theory?
For expansion - Red shift. For explosion - CMB cosmic microwaves background radiation.
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What is the steady state theory?
The universe has always been here and will always be here. The universe is expanding. The density of the universe remains constant. Matter is constantly appearing as the universe expands.
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What evidence is their for the steady stae theory?
For expansion - red shift. No metter appeasring has ever been recorded.
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What is red shift?
As galaxies move away from us the light from is shifted towards the red end of the spectrum. (the wavelenght increase/frequency decreases). Further away galaxies show greater red shift which suggest they are moving away faster.
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What is CBM?
During the big bang huge amount of energyy was released in the form of high frequency (short wavelength) waves, as the universe expands these waves have been streched and have become low frequency microwaves.
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Card 2

Front

What are the size of object in increasing order?

Back

Asteroids/Comets, Moons, Planets, Stars, Solar System, Galaxies and The Universe.

Card 3

Front

What is the distances between objects in increasing order?

Back

Preview of the front of card 3

Card 4

Front

What does SETI stand for?

Back

Preview of the front of card 4

Card 5

Front

What is the method for gathering the edidence for life beyond Earth?

Back

Preview of the front of card 5
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