Lithosphere: Rocks & Soils 0.0 / 5 ? OtherThe EarthUniversityNone Created by: MariaC5Created on: 07-04-18 17:05 Ga is how many years ago? 1 billion 1 of 17 The earth formed how many years ago? 4.6 Ga 2 of 17 How old are the oldest rocks at the Earth's surface? 4 Ga 3 of 17 The earliest evidence of life was how many years old? 3.7 Ga 4 of 17 The Cambrian explosion was how many years old? 500 Ma 5 of 17 Pangaea formed and broke up how many years ago? 300 Ma 6 of 17 The extinction of dinosaurs was how many years ago? 65 Ma 7 of 17 The beginning of the last ice age was how many years ago? 2.5 Ma 8 of 17 The Earth's oldest rocks are found in? Canada 9 of 17 The Earth has how many major plates? 7 10 of 17 The Earth has how many minor plates? 8 11 of 17 What is responsible for the movement of the plates? Convection currents 12 of 17 Which crust is younger? Oceanic 13 of 17 Gondwana is what? Broken Pangaea 14 of 17 Carbon dating only goes back how far? 50,000 yrs 15 of 17 Gas trapped in rocks is evidence for... A warming climate 16 of 17 What gas trapped in rocks is used to work out the temperature at the time of formation? Oxygen 17 of 17
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