| Method |
Precise Learning Objective |
Linked |
Question / Activity
(Designed for maximum working out) |
Stepping Stones |
Pitstop Check
(Thinking Map) |
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There are lots of different rocks of all sorts of ages. |
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Are all rocks the same age? |
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The oldest rocks are found in Africa, Canada and Australia. |
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Where are the oldest rocks found? |
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The youngest rocks are found around volcanoes. |
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Where are the youngest rocks on the earth generally found? |
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There has been no new rock material added to the earth since it was created apart from a small amount of meteorites. |
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Why has the amount of rock material on the earth remained fairly constant since its formation? |
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New rocks are made from recycled material. |
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What materials are new rocks made from? |
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Igneous rocks are formed when molten rocks freeze. |
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What type of rocks are formed when molten rock freezes? https://www.geolsoc.org.uk/ks3/webdav/site/GSL/shared/pdfs/education and careers/RockCycle/Salol Experiment.pdf |
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When frozen, the particles in the rocks are fixed in a lattice, that is why the rocks hold their shape. |
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Describe the structure of particles in an igneous rock |
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Solids are made up of crystals. Crystals are regions of a single lattice orientation. |
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Solids are made up of crystals. What are crystals? |
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When solids freeze quickly the crystals are small. |
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How does the rate at which something freezes affect the size of the crystals it contains? |
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The crystals are large because the particles have more time to line up before freezing. |
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Why are the crystals formed larger when an object freezes more slowly? |
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The crystals are small because the particles have less time to line up before freezing. |
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Why are the crystals formed smaller when an object freezes quickly? |
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When solids freeze slowly the crystals are large. |
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What size crystals are formed when solids freeze slowly? |
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When igneous rocks are formed under the ground they cool slowly so the crystals are large. |
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What is the impact on the structure of an igneous rock when it forms slowly under the ground? |
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When igneous rocks are formed above ground or in water they cool quickly so the crystals are small. |
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What is the impact on the structure of an igneous rock when it forms above the ground or in water, resulting in tit cooling rapidly? |
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The size of crystals affects some of the properties of the rock. |
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Does the size of crystals affect the properties of a rock? |
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