Name the 4 outer planets, furthest away from the sun.
Jupiter, Saturn, Uranus and Neptune.
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How old is the Solar system?
About 5 thousand million years old.
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What are asteroids and comets made of?
Made of stuff left over from the formation of the solar system.
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What Galaxy are we in?
The Milkyway.
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What is the universe made of?
Millions of galaxies- that's a lot of stars.
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What is a light year?
The distance that light travels through a vacuum in one year.
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How big is the Sun's diameter to the Earth?
100 times bigger.
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How big is the Milky way's diameter to the sun?
600 billion times.
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What can the colour of star tell us?
What the temperature of the star is.
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What is the definition of parallax?
When something appears to move when you look at it from different places.
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The................... ........................of a star between two photos let's you work out how far away it is. Stars further away appear to move less.
Apparent movement.
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Why do scientists use Hubble Space Telescope?
They don't get a light pollution problem.
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What is Red shift?
When a galaxy is moving away from us the wavelength of the light from it changes- the light becomes redder.
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The more..............the galaxy, the................it moves away from us.
Distant, faster
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What provides evidence that the whole Universe expanding?
Red shift
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Has the Universe stopped expanding?
No, although the process has slowed down since the big bang.
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True or false in tens and millions of years the Earth will look very different on how it is now.
True, it's going to look very different than it does today.
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What provides a record of changes in the Earth?
Rocks.
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What was Wegener's theory?
Continental drift.
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What evidence is there for continental drift?
Fossils, coastlines, matching layers of rocks on different continents.
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What are the 2 types of crusts?
Continental crust(forming the land) and Oceanic crust(under oceans)
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What is the core in the Earth made out of?
Iron and Nickel.
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What is the Earth's surface made up of?
Tectonic plates.
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How are volcanoes formed?
Often formed at the boundaries between two tectonic plates- magma is produced, which can rise up, forming a volcano.
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How are mountains formed?
Plates crashing into one another.
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When there's an earthquake, it produces wave motions(shock motions) which travel on the surface and inside the Earth. We record these seismic waves all over the surface of the planet using, what?
Seismographs.
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What can P- waves travel through?
Solids and liquids.
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What can S- waves travel through?
Solids.
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Are P- waves longitudinal or transverse?
Longitudinal.
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Are S- waves longitudinal or transverse?
Transverse.
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Are P- waves slower or faster than S- waves?
Faster.
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Are S- waves slower or faster than P- waves?
Slower.
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All waves are basically just disturbances that are caused by a .......................source.
Vibrating.
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What is the wave speed equation?
Wave speed=Frequency x Wavelength.
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Other cards in this set
Card 2
Front
Name the 4 outer planets, furthest away from the sun.
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