1. Map of the Early Jurassic age 200 million years ago
Here is a map of the world in the mid-Jurassic period (about 200 million years ago). Before this the world's land mass was one super-continent known as Pangaea. 200 million years ago Pangaea started to break apart with the sea working its way into the rift valleys formed between North America and Africa.

2. Late Jurassic age 150 million years ago
During the Jurassic period, Pangaea began to break-up into two smaller super-continents: Laurasia ( North America, Europe, and Asia), and Gondwanaland (combining South America, Africa, India, Australia and Antarctica).

3. The Jurassic world was warmer than that of today and there seems to have been no glaciation or ice caps at the poles

4. Large dinosaurs 
roamed forests of large conifer trees during the Jurassic Period.

6. Dinosaur Footprint

7. New Coral Seas
Sunlight shined brightly on the waters surface and shafts of light penetrated to the sea floor. Tall crinoids caught particles of food with their branch-like tentacles, as Cryptoclidus swooped into the scene over a dense coral reef that spread out across the seabed. (Late Jurassic).

8. These were shallow tropical waters with a seabed rich with life
These were shallow tropical waters with a seabed rich with life.  The shells of these sea creatures were composed of calcium carbonate. When they died the shell accumulated at the bottom of the sea to form the limestone, which today we know as the Jura.

9. Limestone Fossils

10. The Jura Today

11. Experiment One: Heating Limestone or Chalk
1. Put a stick of chalk into the holder and heat it in a roaring Bunsen flame. Continue heating for 10 minutes until at least some of the limestone chip glows brightly. Leave it to cool, meanwhile move on to experiment four.
The calcium carbonate is broken up (decomposed) by the heat. A gas (which you cannot see) is given off.
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12. Making Limelight
In the olden days the bright light for spotlights were made by heating lime.
Calcium Oxide
Screw for rotating and raising the Calcium oxide
Hydrogen
Oxygen

13. Experiment 1 What do you think the gas will be? ______________
Carbon Dioxide
What do you think the gas will be? ______________
The new substance glows with a bright light when heated. Large blocks of limestone were, many years ago, heated in this way to provide a bright light (limelight) for theatres.
What is the solid left behind when
calcium carbonate decomposes: ______________
Calcium oxide
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14. Experiment 1 Equation
Write word and symbol equations for the reaction when limestone is heated.
WORD:
CALCIUM CARBONATE > ________________ + ________________
SYMBOL:
CaCO > ________________ + ________________
Carbon Dioxide
Calcium oxide
CO2
CaO
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15. Experiment 2 « Thirsty Lime »
When the solid from experiment one is cool put it into a small beaker with a pair of tongs. DO NOT TOUCH IT!
Carefully, using a dropping pipette, add three or four drops of water to the solid. Observe what happens and feel the bottom of the watch glass. The solid looks lively! It is commonly called QUICKLIME.
Record ALL your observations:-
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16. SLAKED LIME
QUICKLIME reacts very violently with water. The new white sold is SLAKED LIME, chemical name, Calcium hydroxide.
>
CaO H2O > Ca(OH)2
SAVE the calcium hydroxide you have made for the next experiment .
C ALCIUM OXIDE
CALCIUM
HYDROXIDE
WATER
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17. Expt Making Limewater
Take the calcium hydroxide (slaked lime) you made earlier. Add a quarter spatula measure of it to a boiling tube and half fill it with de-ionised water.
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18. Expt Making Limewater
Stir with a glass rod to dissolve some of the solid.
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19. Filtering Filter the mixture into a conical flask.
You have now made a solution of calcium hydroxide.
Ca(OH)2 (s) H2O (l) > Ca(OH)2 (aq)
Draw a neat labelled diagram of the filtering apparatus.
Use a pencil and ruler.
Solid calcium hydroxide
Calcium hydroxide solution
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20. Expt. 4 The carbon dioxide test
Blow gentley and make sure the straw is half way in the water.
Complete the word and symbol equations:
CALCIUM CARBON > WATER
HYDROXIDE DIOXIDE ____________
SYMBOLS:
CALCIUM
CARBONATE
straw
End of
straw
Ca(OH) CO  CaCO H2O
You have now made a suspension of Calcium Carbonate or limestone.
IMPORTANT keep this solution for Experiment 7
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21. Expt Acid & Slakedlime
Add about 1cm depth of hydrochloric acid to a test-tube and two drops of universal indicator. Add a small spatula measure of the slaked lime to the test-tube and stir it with a glass rod.
Describe what happens to the solid and the universal indicator.
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22. Adding Lime to Acid Soil
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23. Experiment 5 Equation +  + Ca(OH)2 + ____HCl  CaCl2 + ________
C ALCIUM HYDROXIDE
HYDROCHLORIC
ACID
CALCIUM
CHLORIDE
WATER 2
2H2O
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24. Experiment Six: Limestone and Acid.
Put a piece of limestone into a test tube and add about 5cm3 of dilute hydrochloric acid. A gas is given off, what do you think it will be?
______________________
Carry out a chemical test for this gas.
Describe the result and draw a diagram.
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25. Draw a neat labelled diagram with a pencil and ruler of this experiment.
Limewater
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26. Experiment 6 Equation
+  + + CaCO3 + ____ HCl  CaCl2 + ________ + CO2
C ALCIUM CARBONATE
HYDROCHLORIC
ACID
CALCIUM
CHLORIDE
CARBON
DIOXIDE
WATER 2
H2O
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27. Experiment 7 LIMESTONE CAVES
In experiment 4 you made a suspension of limestone.
The aim of this experiment
is to find out what happens
to the suspension of
limestone when you blow
excess carbon dioxide into
it.
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28. Limestone Cave Experiment 7
Continue blowing through the straw into the solution until another change takes place.
Describe what happens.
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29. Limestone Cave Experiment 7
CALCIUM CARBON CALCIUM
CARBONATE DIOXIDE _______  HYDROGENCARBONATE
CaCO3(s) ____ H2O  Ca(HCO3)2(aq)
IMPORTANT KEEP THE CLEAR SOLUTION FOR THE NEXT EXPERIMENT.
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30. Underground Rivers

31. De L'Allondon est une rivière de l'Ain en France

32. Jura

33. Experiment 8
STALACTITES
AND
STALAGMITES
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34. Making Calcium Carbonate Again
If the solution from experiment seven does not become clear when passing more carbon dioxide through it, filter it again into another clean test-tube.
Heat the clear solution. What do you see?
Use the equation below to explain what happened.
CALCIUM > CALCIUM CARBON WATER
HYDROGENCARBONATE CARBONATE DIOXIDE + +

35. Summary Copy out the sentences and equations (page 7) onto the diagram in the appropriate place.
Rain drops dissolve carbon dioxide to make a weak acid.
H2O(s) + CO2(g) > H2CO3(aq)
As rain percolates through calcium carbonate rock which reacts with the weak acid and forms a soluble salt.
H2CO3(aq) + CaCO3(s) > Ca(HCO3)2(aq)
The calcium hydrogen carbonate solution evaporates and leaving calcium carbonate.
Ca(HCO3)2(aq) > CaCO3(s) H2O(S) CO2(g)

36. What do you call a blind dinosaur?