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Choose the correct answer Sedimentary rocks... Were formed when magma forced its way into the earth’s crust Were formed when material was deposited by rivers onto the sea bed Were formed when rocks were changed by high temperature and /or pressure

This rock was changed when it was crushed and folded under great pressure Sorry - that is wrong Metamorphic rocks were formed when rocks were changed by very high temperatures or pressure

Sorry - that is wrong Igneous rocks were formed when magma forced its way to the earth’s crust.

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Choose the correct answer Igneous rocks... Were formed when material was deposited by rivers onto the sea bed Were formed when magma forced its way into the earth’s crust Were formed when rocks were changed by high temperature and /or pressure

Sorry - that is wrong Metamorphic rocks were formed when rocks were changed by very high temperatures or pressure

Sorry - that is wrong Sedimentary rocks were formed when layers of material (sediment) was deposited on the sea bed

Choose the correct answer Metamorphic rocks... Were formed when material was deposited by rivers onto the sea bed Were formed when magma forced its way into the earth’s crust Were formed when rocks were changed by high temperature and /or pressure

Sorry - that is wrong Igneous rocks were formed when magma forced its way to the earth’s crust.

Sorry - that is wrong Sedimentary rocks were formed when layers of material (sediment) was deposited on the sea bed

Choose the 4 correct answers Are igneous Extrusive rocks... Are sedimentary rocks Were formed above the earth’s crust, at the surface Were formed within the earth’s crust Usually have large crystals Granite is an example of an extrusive rock Basalt is an example of an extrusive rock Usually have small crystals Are metamorphic rocks Click here to check your answers

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Extrusive rocks are igneous • They were formed when molten magma forced its way into the earth’s crust • The magma broke through the crust and onto the earth’s surface • The magma cooled quickly above the earth’s surface

That’s right. Extrusive rocks were formed above the earth’s crust • The molten magma was able to reach the surface of the earth. It cooled quickly at the surface.

Granite is intrusive – it has large crystals Basalt is extrusive – it has small crystals Extrusive rocks usually have small crystals • The molten magma cooled quickly at the surface, so large crystals did not have time to form. Crystals in extrusive rocks are small.

Basalt is an example of an extrusive rock • You know this because basalt has small crystals - this tells you that it cooled quickly above the earth’s surface so large crystals did not have time to form.

Choose the 4 correct answers Are igneous Extrusive rocks... Are sedimentary rocks Were formed above the earth’s crust, at the surface Were formed within the earth’s crust Usually have large crystals Granite is an example of an intrusive rock Basalt is an example of an intrusive rock Usually have small crystals Are metamorphic rocks Click for next question

Choose the 4 correct answers Are igneous Intrusive rocks... Are sedimentary rocks Were formed above the earth’s crust, at the surface Were formed within the earth’s crust Usually have large crystals Granite is an example of an intrusive rock Basalt is an example of an intrusive rock Usually have small crystals Are metamorphic rocks Click here to check your answers

Intrusive rocks are igneous • They were formed when molten magma forced its way into the earth’s crust • However, the magma did not get as far as the earth’s surface • The magma cooled slowly beneath the earth’s surface Intrusive rocks

Magma did not get to the surface Intrusive rocks were formed within the earth’s crust • The molten magma was not able to reach the surface of the earth. It cooled slowly beneath the surface.

Intrusive rocks usually have large crystals • The molten magma cooled slowly beneath the surface, so large crystals had time to form. Crystals in intrusive rocks are large.

Large crystals Granite is an example of an intrusive rock • You know this because granite has large crystals - this tells you that it cooled slowly beneath the earth’s surface so large crystals had time to form.

Choose the 4 correct answers Are igneous Intrusive rocks... Are sedimentary rocks Were formed above the earth’s crust, at the surface Were formed within the earth’s crust Usually have large crystals Granite is an example of an intrusive rock Basalt is an example of an intrusive rock Usually have small crystals Are metamorphic rocks Click for next question

Choose the 3 correct answers A metamorphic rock Limestone is... Made mostly from bones Made from sodium carbonate A sedimentary rock Made from calcium bicarbonate Made mostly from sea shells Made from calcium carbonate An igneous rock Made mostly from mud

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Choose the 3 correct answers A metamorphic rock Limestone is... Made mostly from bones Made from sodium carbonate A sedimentary rock Made from calcium bicarbonate Made mostly from sea shells Made from calcium carbonate An igneous rock Made mostly from mud Click for next question

Choose the 4 correct answers Limestone can be used.. as a building material as a fertiliser to make glass To make plastic to make toothpaste to make cement to neutralise acidic soils to neutralise alkaline soils as a road surfacing material Finished? Click here to check your answers

Limestone can be used as a building material • Yes, that’s right. Limestone makes a good building material in areas where it is plentiful. • It can be quarried and cut into blocks • These blocks can be used to build houses • However - it is badly affected by acid rain (although this happens slowly)!!

Limestone can be used as a fertiliser SORRY THAT’S WRONG!!! Limestone does not have important plant nutrients in it (such as nitrogen or phosphates)

Limestone can be used to make plastic SORRY THAT’S WRONG!!! Oil, not limestone, is used to make plastics

LIMESTONE + SAND + SODA heatGLASS Limestone can be used to make glass • Yes, that’s right. Limestone is mixed with sand and soda (sodium carbonate) • They are then heated • The mixture melts • When it cools it is transparent

Limestone can be used to make toothpaste SORRY THAT’S WRONG!!! Kaolin, not limestone, is used to make toothpaste

POWDERED LIMESTONE + POWDERED CLAY HEAT DRY CEMENT DRY CEMENT + SAND + GRAVEL + WATERCONCRETE Limestone can be used to make cement • Yes, that’s right. Powdered limestone is mixed with powdered clay. • They are then heated to make dry cement • The cement is mixed with sand, gravel and water. When it dries it makes a hard stone like building material called concrete

LIMESTONE HEAT QUICKLIME CALCIUM CARBONATE CALCIUM OXIDE + CARBON DIOXIDE QUICKLIME + WATERSLAKED LIME CALCIUM OXIDE CALCIUM HYDROXIDE Limestone can be used to neutralise acidic soils • Yes, that’s right. Powdered limestone can be put onto acidic soils but it is very slow to work . • So it can be heated to make quicklime. • Quicklime can be mixed with water to make slaked lime. • Slaked lime is a hydroxide (a strong alkali) so it works much faster.

Limestone can be used to neutralise alkaline soils SORRY THAT’S WRONG!!! Limestone is alkaline, so it would make them MORE alkaline

Limestone can be used as a road surfacing material SORRY THAT’S WRONG!!! Basalt or dolerite, not limestone, are used for road surfacing

The 4 correct answers are:- Limestone can be used.. as a building material as a fertiliser to make glass To make plastic to make toothpaste to make cement to neutralise acidic soils to neutralise alkaline soils as a road surfacing material Click for next question

Choose the 4 correct answers Limestone .. Is an igneous rock Contains bedding planes and joints Contains large crystals Contains fossils Is a sedimentary rock Is a metamorphic rock Can often be dated easily Finished? Click here to check your answers

Limestone is a sedimentary rock • Yes, that’s right. Limestone was formed from millions of shelled sea creatures. • When they died they fell to the sea bed to form thick layers of shell. • As the layers became thicker and thicker the bottom layers became crushed and cemented to form solid rock

Limestone contains bedding planes and joints • Yes, that’s right. Because limestone was formed in layers, these layers can still be seen as bedding planes. joints Bedding planes

Yes, that’s right. Limestone was formed from millions of shelled sea creatures and the shells can sometimes still be seen in the rock. Limestone contains fossils

For example, some layers of limestone contain crinoids. We know crinoids were alive between 360 – 320 million years ago. Limestone can be dated easily • Yes, that’s right. Limestone contains fossils. The fossils can tell us how old the limestone is.

The 4 correct answers are: Limestone .. Is an igneous rock Contains bedding planes and joints Contains large crystals Contains fossils Is a sedimentary rock Is a metamorphic rock Can often be dated easily Click for next question

Which of the following are sedimentary rocks... sandstone basalt granite limestone slate marble Finished? Click here to check your answers

Sorry - that is wrong It’s metamorphic (changed by heat or pressure) Try again

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