rock observations

Lesson Aims

Here are 4 sedimentary rocks

How
sedimentary
rocks are
made.

1. Sandstone

Why fossils
are in
sedimentary
rocks.

4.

2.
3.


Lesson Aims

Cut out the five pictures.

How
sedimentary
rocks are
made.

Stick them into your book in the same
order.

Why fossils
are in
sedimentary
rocks.

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

We left the plaster to go hard.

How
sedimentary
rocks are
made.

We put some plaster into the mould.

Why fossils
are in
sedimentary
rocks.

We made a mould out of plasticine.
We pushed a shell into the plasticine.
We mixed up some plaster.


Lesson Aims

Sedimentary rocks

How
sedimentary
rocks are
made.

weathered the
When old rocks are …………………
bits are transported
………………… to other places.

Why fossils
are in
sedimentary
rocks

squashed into

Layers which are …………………

settle
When the bits …………………
they form
new rock.

squashed
weathered

settle
transported


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.


molten Rock.
Igneous rock starts as …………………
crystals are made when it cools.
…………………
slowly
If it cools …………………,

they will be big.
fossils
There are never …………………
in igneous rock because
melted
they get …………………

crystals

melted

molten

slowly

fossils


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.


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.


Rock
name

Are
Are there Mass
there
grains?
before
crystals?
putting in
water (g)

Mass
Were
after
there any
putting in bubbles?
water (g)

Sandstone
Granite
Sandstone and granite are different rocks because…

I think that the sandstone changed mass the most because…


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.


Lesson Aims
How
sedimentary
rocks are
made.
Why fossils
are in
sedimentary
rocks.

When new rocks are made, they
break
start to …………………
down into small pieces. This is called
weathering .
…………………
wind
This is done by …………………
,

water
ice
…………………
and …………………

ice
wind

break
weathering

water