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Lesson Aims How sedimentary rocks are made. Why fossils are in sedimentary rocks. - PowerPoint PPT Presentation


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Here are 4 sedimentary rocks Sandstone. Lesson Aims How sedimentary rocks are made. Why fossils are in sedimentary rocks. Cut out the five pictures. Stick them into your book in the same order. Match them up with these statements. Acid rain makes a crack in the rock.

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Presentation Transcript
slide2

Here are 4 sedimentary rocks

  • Sandstone

Lesson Aims

How sedimentary rocks are made.

Why fossils are in sedimentary rocks.

slide3

Cut out the five pictures.

  • Stick them into your book in the same order.
  • Match them up with these statements.
    • Acid rain makes a crack in the rock.
    • Bits of the rock fall off.
    • The ice expands.
    • Water in the crack freezes.
    • The rock is cracked.
  • Write the statements beside the pictures.

Lesson Aims

How sedimentary rocks are made.

Why fossils are in sedimentary rocks.

slide4

Lesson Aims

How sedimentary rocks are made.

Why fossils are in sedimentary rocks.

We left the plaster to go hard.

We put some plaster into the mould.

We made a mould out of plasticine.

We pushed a shell into the plasticine.

We mixed up some plaster.

slide5

Lesson Aims

How sedimentary rocks are made.

Why fossils are in sedimentary rocks

Sedimentary rocks

When old rocks are ………………… the

bits are ………………… to other places.

When the bits ………………… they form

Layers which are ………………… into

new rock.

weathered

transported

settle

squashed

slide6

Crystals in igneous rocks

  • Cut out the two crystal pictures.
  • Stick them in your book.
  • Write these descriptions beside the correct picture.
    • These crystals are big. They were made when the rock cooled slowly.
    • These crystals are small. They were made when the rock cooled quickly.
slide7

molten

Igneous rock starts as ………………… Rock.

………………… are made when it cools.

If it cools …………………, they will be big.

There are never ………………… in igneous rock because

they get …………………

crystals

slowly

fossils

melted

slide8

Sedimentary rocks like sandstone and limestone are soft rocks.

They are made by bits of weathered rocks settling in layers.

They are made of grains. Sedimentary rocks are the type most likely to have fossils.

slide9

Igneous rocks like granite very hard rocks.

They are made of crystals that formed as molten lava cooled.

Igneous rocks never have fossils.

Metamorphic rocks like slate and marble are also very hard rocks.

They are made of crystals that formed as other rocks were changed by heat and pressure.

Metamorphic rocks don’t often have fossils.

slide10

Sandstone and granite are different rocks because…

I think that the sandstone changed mass the most because…

slide11

Metamorphic rocks like slate and marble are very hard rocks.

They are made of crystals that formed as other rocks were changed by heat and pressure.

Metamorphic rocks don’t often have fossils.

slide12

When new rocks are made, they

start to …………………

down into small pieces. This is called

………………… .

This is done by ………………… ,

………………… and …………………

Lesson Aims

How sedimentary rocks are made.

Why fossils are in sedimentary rocks.

break

weathering

wind

water

ice