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Do now! Can you complete the experiment sheet we did last lesson? Interesting scientist.

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Presentation on theme: "Do now! Can you complete the experiment sheet we did last lesson? Interesting scientist."— Presentation transcript:

1 Do now! Can you complete the experiment sheet we did last lesson? Interesting scientist

2 Last lesson Investigating the suitability of rocks for different purposes

3 Which rock would make the best statue? What did you decide?

4 Today’s lesson Three main rock types

5 Igneous

6 Three main rock types Sedimentary

7 Three main rock types Metamorphic

8 Igneous rocks From the latin “ignis” meaning fire

9 Igneous rocks Formed by the cooling of lava or magma What’s the difference?

10 Igneous rocks Made from crystals

11 Igneous rocks Quick cooling forms small crystals, slow cooling forms large crystals

12 Igneous rocks Basalt is formed by quickly cooling lava

13 Igneous rocks Pumice is formed from lava that contains a lot of gas. It can float!

14 Igneous rocks Obsidian is like dark glass formed when molten silica cools quickly!

15 Igneous rocks Granite is made from magma that cools slowly underground

16 Sedimentary rocks

17 Sediments like sand and mud build up at the bottom of oceans and rivers

18 Sedimentary rocks Over millions of years pressure from successive layers forms these into sedimentary rocks

19 Sedimentary rocks Layers!

20 Sedimentary rocks Animals and plants can be trapped in the sediments and can form fossils

21 Sedimentary rocks Sandstone is made from sand grains stuck together

22 Sedimentary rocks Limestone is made from the mineral calcite which came from the beds of evaporated seas and lakes and from sea animal shells.

23 Sedimentary rocks Conglomerate rocks are made up of large sediments like pebbles. The sediment is cemented together with dissolved minerals.

24 Sedimentary rocks Shale are formed from clay and mud that is compacted together by pressure.

25 Metamorphic rocks

26 Metamorphic rocks are rocks that have "morphed" into another kind of rock.

27 Metamorphic rocks These rocks were once igneous or sedimentary rocks. The rocks are under tons of pressure, which causes heat build up, and this causes them to change.

28 Metamorphic rocks These often also contain thin layers and crystals but are much harder than sedimentary rocks

29 Metamorphic rocks Marble is limestone that has been metamorphised

30 Metamorphic rocks Slate is metamorphised shale

31 Metamorphic rocks Anthracite coal

32 Brain-map Mr Porter is now going to put these slides on a loop so you can brain map them!


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