1. Core Chemistry Big Teach 1: Materials From the Earth

2. Key terms used in exam questions
Quary – Where we dig limestone

3. Rocks Sedimentary Metamorphic Igneous Examples: Marble
Examples: Chalk and Limestone
How was it formed?
Sediments fall to bottom of the sea
Over millions of years
Layers compact
Rock formed
Things to know:
They contain fossils
They erode easily
Examples: Marble
How is it formed?
Sedimentary rocks are put under heat and pressure
Things to know
Limestone turns into Marble
The heat comes from the magma
Examples: Granite
How is it cooled
When Lava cools
Things to Know
Marble turns into granite
If the lave cools quickly it contains small crystals
If it cools slowly It contains large crystals

4. Questions

5. Answers

6. The Limestone Cycle
You can use this diagram to answer any exam questions:
e.g: word equations
Calcium Carbonate
Solution goes cloudy
Water
Carbon dioxide
Hissing, steam, solid crumbles into a powder
Calcium Oxide
Carbon Dioxide
Water

7. Remember – They are all the same thing
Limestone
Calcium Carbonate
CaCO3

8. Remember – They are all the same thing
Limewater
Calcium Hydroxide
Ca(OH)2

9. Remember – The Test for carbon dioxide
Bubble the gas through limewater
Lime water goes cloudy

10. Calcium Carbonate – The neutraliser
Why is it sprayed onto fields
Neutralise acidic soil
Why is it sprayed onto waste gases from chimneys
Neutralise acidic waste gases
Why is it taken as an indigestion remedy
Neutralise excess acid in stomach

11. Questions

12. Answers

13. After its use it can be turned into a lake Damages habitats
Advantages of a limestone quary
Disadvantages of a limestone quary
Social (people living in the local area)
 Provides jobs   
 Noisy
Dusty
Evironmental
 After its use it can be turned into a lake
 Damages habitats
Economic (money)
 Limestone is a valuable resource
 Loss of tourism