what is a precipitate?

what does a number in front of a formula apply to?

Ca + H2O --> Ca(OH)2 + H2

what is the state symbol for 'dissolved in water'

Name the two main gases in the earth's atmosphere today

Explain how today's atmosphere is different from today's atmosphere

How were the oceans formed?

List 3 ways which human activity is changing the atmosphere

Apart from humans, what else is changing the atmosphere

How could you investigate the proportion of oxygen in the air?

what are the three main types of rock

what type of rock is marble?

How is marble formed

what type of rock is chalk

What is the difference in the way that extrusive and intrusive rocks form?

What is thermal decomposition?

Write down (word equation for taylor) Symbol equation for the thermal decomposition of limestone.

how could you test for carbon dioxide in a thermal decomposition reaction

What product is made by adding water to calcium oxide.... why is it useful?

Are atoms lost or just rearranged?

How well did you do?