AQA Chemistry 1
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Where do volcanoes happen?
On tectonic plate boundaries
Why do people ignore scientists predictions of earthquakes?
Cannot predict WHERE, WHEN or the STRENGTH of the earthquake
What is the percentage of oxygen in the atmosphere today?
How were oceans formed?
Water vapour cooled and condensed
What are the layers in the Earth?
Crust, mantle and core
What created gases in the Earths early atmosphere?
How do earthquakes happen?
Tectonic plates move suddenly, caused by convection currents in the mantle, caused by radioactive processes
What is the percentage of nitrogen in today's atmosphere?
What evidence suggests the continents used to be joined?
- Fit like a jigsaw
- Fossils found on both South America and Africa
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