1. Rocks

2. Types of Rocks
Metamorphic Rocks
Igneous Rocks
Sedimentary Rocks

3. Igneous Rocks - what are they ?
They are rocks that have been . . .
formed underground by trapped, cooled magma
formed above ground when volcanoes erupt and magma cools

4. Types of Igneous Rocks
Granite
Basalt
Pumice
Obsidian

5. Sedimentary Rocks - how they are made
Wind and water break down the earth
Bits of earth settle in lakes and rivers
Layers are formed and build up
Pressure and time turn the layers to rock

6. Types of Sedimentary Rocks
Sandstone
Limestone
Gypsum
Conglomerate
Shale

7. Metamorphic Rocks - what are they ?
They are rocks that have changed
They were once igneous or sedimentary
Pressure and heat changed the rocks
Bands of crystals can be seen

8. Types of Metamorphic Rocks
Schist
Gneiss
Travertine

9. Fizz with hydrochloric acid ?
Comparing igneous, sedimentary and metamorphic rocks
Decide YES, NO or POSSIBLY.
Igneous
Sedimentary
Metamorphic
Hard ?
Crystals ?
Grains ?
Layers ?
Bands or streaks ?
Fossils ?
Fizz with hydrochloric acid ?

10. Fizz with hydrochloric acid ?
Comparing igneous, sedimentary and metamorphic rocks
Decide YES, NO or POSSIBLY.
Igneous
Sedimentary
Metamorphic
Hard ?
Crystals ?
Grains ?
Layers ?
Bands or streaks ?
Fossils ?
Fizz with hydrochloric acid ?
YES
POSSIBLY
YES
YES NO
POSSIBLY NO
YES NO NO
YES NO NO NO
YES NO
YES NO NO
POSSIBLY
POSSIBLY

11. Rocks have been used for many years, and for many different things.

27. The End