What is a hypothesis?
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What is erosion?
How does a volcano erupt?
Why does marble rarely contains fossils?
How can we calculate or estimate the evaporation from lakes?
What is ore?
What is matte?
When a Volcanic mountain made up is called?
What is natural resource?
Describe the formation of igneous rocks?
Describe the main types off rocks. How the different types of rocks formed ?
Which carbonate mineral reacts readily with cool dilute hydrochloric acid to produce visible bubbles of carbon dioxide gas?
Define china clay?