chemistry

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  • Created by: khadijah
  • Created on: 19-02-13 18:49

1. Which gas was present in the early earth atmosphere?

You said: Ammonia

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

2. What do scientists think was responsible for much of the gases in the early earth atmosphere?

You said: Volcanoes

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

3. Which gas makes up nearly 80% of our current atmosphere?

You said: Nitrogen

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

Types of rock

1. Granite is an example of which type of rock?

You said: Igneous

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

2. Which type of rock is it most likely to be if it contains fossils?

You said: Sedimentary

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

3. What type of crystals will an extrusive igneous rock have?

You said: Small

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

4. Which type of rock is formed from cooled magma?

You said: Igneous

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct. Cooled magma forms igneous rocks.

calcium carbonate 1. Limestone, chalk and marble are all examples of which compound?

You said: Calcium carbonate

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

2. What is the process known as where a compound is broken down using heat?

You said: Thermal decomposition

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

3. Which carbonate would break down easiest?

You said: Copper carbonate

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct.

4. Which calcium compound is used to remove acidic gases from coal fired power stations?

You said: Calcium carbonate

Correct (http://www.bbc.co.uk/schools/ks3bitesize/images/f/shared/tick.gif) Correct

Metals

. How would potassium be extracted from…

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