1. Title: Igneous and Metamorphic Rock
Welcome Year 8 Sit in your allocated seat, get out your equipment and write the title and date, and begin the starter.
Date: 03 December 2018
Title: Igneous and Metamorphic Rock
Starter: 3 MINS
In your books
What are rocks made of?
Name 2 sedimentary rocks.
Rocks are made from a combination of minerals and can be hard or soft depending on how the minerals are arranged.

2. I will learn:
How metamorphic and igneous rocks are made.
ALL: Describe how igneous and metamorphic rocks form.
I will apply my learning by:
MOST: Explain the difference between intrusive and extrusive rocks.
Literacy Focus:
Reading and writing
Use Key words:
Magma, metamorphic, igneous.
SOME: Investigate how cooling size affects crystal size.
I will evaluate my learning by:
Peer-assessing past exam paper questions.

3. 3 types of rock
Metamorphic
Igneous
Sedimentary

4. Igneous rocks
Igneous rocks are formed when lava or magma cools down and solidifies
If the lava or magma cools QUICKLY it has SMALL crystals
If the lava or magma cools SLOWLY it has BIG crystals

5. Example – granite, basalt.
Apply your learning, in your books: 6 MINS
Explain why extrusive and intrusive igneous rocks are likely to have different crystal sizes.
You never find fossils inside igneous rocks, why do you think this is.
Igneous Rocks
Example – granite, basalt.
Formed by the solidification of magma or lava
They contain crystals whose size depends on the rate of cooling.
Fast cooling = small crystals
Slow cooling = large crystals
EXTENSION: Explain where the magma/lava comes from?

6. Metamorphic Rock Marble, slate
Apply your learning, in your books: 4 MINS
Describe how metamorphic rock is formed.

7. Title: Exploring how cooling rate affects crystal size.
Using a chemical called salol.
Forms crystals as it solidifies.
We are going to place liquid salol onto glass slides that have been kept at different temperatures.
We will let the salol solidify then observe the crystals and record our observations.

8. Hypothesis: How will cooling rate affect the final crystal size
Hypothesis: How will cooling rate affect the final crystal size? I think that the largest crystals will form on the hot/cold slides, this is because…

9. Subheading: Conclusion
Write a conclusion to the experiment.
In your conclusion you must have answered the following questions.
What did we find? How did cooling rate affect the crystal size.
How can you apply your findings in this experiment to the formation of igneous rocks?

10. Evaluating today’s learning:
Pressure from the building rock layers above (1), and heat from the magma in the mantle (1) transform the limestone into marble.
It tells you that it was formed by very quickly cooling magma/lava (1). This would imply it was probably an extrusive igneous rock (1).
As animal and plant remains drop to the bottom of rivers/seas they are covered by other sediment and fossilised, so sedimentary rock often has fossils. (1) Metamorphic rock can also have fossils as it is often sedimentary rock that is metamorphosed (1). Igneous rock will not have fossils as the rock has been completely melted then cooled, so any fossils will have been destroyed (1).
Explain how the sedimentary rock limestone becomes the metamorphic rock marble. (2)
What does the presence of tiny crystals in a piece of igneous rock tell you about it? (2)
Explain which types of rock you are likely to find fossils in, and why you wont find them in others. (3)