P1 Facts 0.0 / 5 ? PhysicsEarth in spaceGCSEOCR Created by: Aisling GallagherCreated on: 26-12-15 15:59 How much is a light year? 9.5 million km 1 of 13 How fast does light travel throuh space? 3.0 x 10thpo5 km/s (300 000 km/s) 2 of 13 When did the big bang happen 14000 million years ago 3 of 13 How old is the oldest star? 12 billion years old 4 of 13 When did the Sun form? 5000 million years ago 5 of 13 When did the Earth form? 4500 million years ago 6 of 13 What were the first elements? H (76%) and He (24%) 7 of 13 When was the Solar System formed? 5000 million years ago 8 of 13 What is the core of the Earth made of? Mostly liquid iron 9 of 13 What is the outer core of the Earth made of? Liqid nickel and iron 10 of 13 What is the inner core of the Earth made of? solid nickel and iron 11 of 13 How thick is the outer core? 2200km 12 of 13 How thick is the inner core? 1250km 13 of 13
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