P1 Facts

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How much is a light year?
9.5 million km
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How fast does light travel throuh space?
3.0 x 10thpo5 km/s (300 000 km/s)
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When did the big bang happen
14000 million years ago
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How old is the oldest star?
12 billion years old
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When did the Sun form?
5000 million years ago
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When did the Earth form?
4500 million years ago
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What were the first elements?
H (76%) and He (24%)
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When was the Solar System formed?
5000 million years ago
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What is the core of the Earth made of?
Mostly liquid iron
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What is the outer core of the Earth made of?
Liqid nickel and iron
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What is the inner core of the Earth made of?
solid nickel and iron
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How thick is the outer core?
2200km
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How thick is the inner core?
1250km
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Other cards in this set

Card 2

Front

How fast does light travel throuh space?

Back

3.0 x 10thpo5 km/s (300 000 km/s)

Card 3

Front

When did the big bang happen

Back

Preview of the front of card 3

Card 4

Front

How old is the oldest star?

Back

Preview of the front of card 4

Card 5

Front

When did the Sun form?

Back

Preview of the front of card 5
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