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© Boardworks Ltd 2005 1 of 26 These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page. This icon indicates the.

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Presentation on theme: "© Boardworks Ltd 2005 1 of 26 These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page. This icon indicates the."— Presentation transcript:

1 © Boardworks Ltd of 26 These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page. This icon indicates the slide contains activities created in Flash. These activities are not editable. For more detailed instructions, see the Getting Started presentation. 1 of 26 © Boardworks Ltd 2005 Geology

2 © Boardworks Ltd of 26 What are the different types of rock? How are igneous rocks formed? How are sedimentary rocks formed? How are metamorphic rocks formed? What is the rock cycle? Learning objectives

3 © Boardworks Ltd of 26 There are 3 types of rock: Sedimentary Metamorphic Igneous Types of rock

4 © Boardworks Ltd of 26 What are the different types of rock? How are igneous rocks formed? How are sedimentary rocks formed? How are metamorphic rocks formed? What is the rock cycle? Learning objectives

5 © Boardworks Ltd of 26 Extrusive igneous rocks are cooled quickly so small crystals form (e.g. basalt). Intrusive igneous rocks are cooled more slowly so large crystals form (e.g. granite). Igneous rocks are formed by the solidification of molten material from below the earth's surface. Igneous rocks

6 © Boardworks Ltd of 26 Granite Basalt What differences do you notice between these two igneous rocks? Granite has visible crystals. Igneous rocks – crystal size

7 © Boardworks Ltd of 26 Igneous rocks Basalt

8 © Boardworks Ltd of 26 Granite Igneous rocks

9 © Boardworks Ltd of 26 Basalt pillars These pillars were formed when lava cooled on the Earth’s surface.

10 © Boardworks Ltd of 26 What are the different types of rock? How are igneous rocks formed? How are sedimentary rocks formed? How are metamorphic rocks formed? What is the rock cycle? Learning objectives

11 © Boardworks Ltd of 26 Sedimentary rocks Sedimentary rocks are made from layers of sediment. They are grainy and crumbly and may contain fossils. Examples of sedimentary rocks are sandstone and limestone.

12 © Boardworks Ltd of 26 Sedimentary rock – sedimentation

13 © Boardworks Ltd of 26 sandstone limestone chalk sandstone Sedimentary rocks

14 © Boardworks Ltd of 26 Sedimentary rocks

15 © Boardworks Ltd of 26 What are the different types of rock? How are igneous rocks formed? How are sedimentary rocks formed? How are metamorphic rocks formed? What is the rock cycle? Learning objectives

16 © Boardworks Ltd of 26 Metamorphic rocks are formed by the effect of extreme pressures and temperatures deep within the Earth. This alters the structure of the existing rock. Metamorphic rock - formation

17 © Boardworks Ltd of 26 Metamorphic rocks Metamorphic rocks show small crystals in layers (bands). Metamorphic rocks are hard and smooth. Examples of metamorphic rocks are slate and marble.

18 © Boardworks Ltd of 26 marble slate Metamorphic rocks

19 © Boardworks Ltd of 26 Continent collision causes metamorphism and huge folds like this one in Scotland. Metamorphic rocks

20 © Boardworks Ltd of 26 Match the rocks with the correct label B A C D 3 granite1 slate4 chalk2 basalt

21 © Boardworks Ltd of 26 Which type of rock am I?

22 © Boardworks Ltd of 26 What are the different types of rock? How are igneous rocks formed? How are sedimentary rocks formed? How are metamorphic rocks formed? What is the rock cycle? Learning objectives

23 © Boardworks Ltd of 26 From weathering to sedimentation

24 © Boardworks Ltd of 26 Rock formation sea volcano Igneous rocks basalt Igneous rocks granites rocks rise to surface by uplift and erosion rocks are broken up by the action of weather magma Metamorphic rocks slate and marble Sedimentary rocks mudstone slow solidification high pressure and temperature transportation and deposition rises to surface where it cools rapidly melt

25 © Boardworks Ltd of 26 Rock cycle

26 © Boardworks Ltd of 26 Do you know your rock cycle?


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