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26 Cards in this Set
- Front
- Back
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Name the planets in the solar system. |
My- Mercury Very- Venus Easy- Earth Method- Mars Just- Jupiter Speeds- Saturn Up- uransus Naming- Neptune Planets- Pluto (dwarf planet) |
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Name 4 other things that are found in our solar system. |
Dwarf planets. Comets. Asteroids. Dust. |
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Describe how the solar system was formed. |
1) The Solar System was formed over a very long period from big clouds of dust and gas. 2) One cloud started to get squeezed slightly. 3) Gravity took over. It pulled things closer together until the whole cloud started to collapse in on itself. 4) At the centre of the collapse, particles came together to form a protostar. Fusion started- hydrogen nuclei joined together to make helium. 5) Fusion gave out massive amounts of heat and light, our Sun was born. 6) All of the chemical elements in the clouds with heavier atoms then helium and hydrogen were also formed in the stars by fusion of different nuclei. 7) Around the sun, material from the cloud containing hydrogen, helium and heavier elements started to clump together ( they formed planets). |
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What are asteroids and comets made off? |
They're made of stuff left over from the formation of Solar System. |
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What are comets? |
Comets are balls of rock, dust and ice which orbit the Sun in very elongated ellipses, often in different planes from the planets. |
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What happens to comets as they approach Sun? |
As the comet approaches the Sun, it's ice melts, leaving a bright tail of gas and debris which can be millions of kilometres long. As it comes away from the sun the tail cools down and forms ice. |
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True of false: Th universe is mostly empty space. |
True. |
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How can the distance in space be measured? |
Using light years. |
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What is a light year? |
The distance light travels in a year through a vacuum (like space). |
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What are asteroids and comets made off? |
They're made of stuff left over from the formation of Solar System. |
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What are comets? |
Comets are balls of rock, dust and ice which orbit the Sun in very elongated ellipses, often in different planes from the planets. |
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What happens to comets as they approach Sun? |
As the comet approaches the Sun, it's ice melts, leaving a bright tail of gas and debris which can be millions of kilometres long. As it comes away from the sun the tail cools down and forms ice. |
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True of false: Th universe is mostly empty space. |
True. |
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How can the distance in space be measured? |
Using light years. |
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What is a light year? |
The distance light travels in a year through a vacuum (like space). |
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What is the speed of light? |
300 000km/s
3x10^8m |
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Put these in order of size smallest first: Diameter of Earth Diameter of the Earth's orbit Diameter of Solar system Sun Sun to the nearest star Milky Way |
Back (Definition) |
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Put these in order of size smallest first: Diameter of Earth Diameter of the Earth's orbit Diameter of Solar system Sun Sun to the nearest star Milky Way |
Back (Definition) |
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What is parallax? |
Parallax is when something appears to move when you look at it from different places (e.g. Hold your fingers at arm's length and look at it first through your left eye, then your right - it seems to move against the background). |
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What is parallax? |
Parallax is when something appears to move when you look at it from different places (e.g. Hold your fingers at arm's length and look at it first through your left eye, then your right - it seems to move against the background). |
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Draw a diagram to show how parallax is used. |
Back (Definition) |
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What is parallax? |
Parallax is when something appears to move when you look at it from different places (e.g. Hold your fingers at arm's length and look at it first through your left eye, then your right - it seems to move against the background). |
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Draw a diagram to show how parallax is used. |
Back (Definition) |
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How can you measure distance of a star? |
Parallax and brightness. |
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True of false: The apparent movement of a star between the two photos lets you work out how far away it is. Stars further away appear to move less (the really distance stars don't appear to move at all). |
True |
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What does the brightness of a star mean? |
1) could be quite close to Earth but not actually that bright. Or 2) A long way away and very bright. |
