Classifications – how to separate different objects into groups

ROCKING ROCKS!

Describe an animal

Using a Branching Keys

Which Dinosaur?

Create a key for 4 people in the room

Describe the rock

Rock Colour Size of grains

Are the grains shiny?

Do the grains fit together?

Sketch of rock texture

Crystals in rocks

shape of grains, and whether or not they interlock

size (or sizes) of the grains

how many different kinds of mineral you can see.

Which ones do you think will let in water

Make a key for the rocks

Mohs’ scale of hardness

Acid or Alkali?

Rain is naturally acidic because of carbon dioxide

MANMADE Acid RAIN

WHY IS THERE ALWAYS SCAFFOLDING ON Monuments?

Limestone pavement

Making your statue

Chemical Weathering

Acid Rain

Porous rock

• Some rocks take in water

• But only the ones with the rounded grains• We will do an experiment next lesson to prove

it.

• This can damage the rock and ruin your statue

Freeze thaw action

Where would you place your statue?

The best rockWhat is the best rock for making a statue that will last for

years?1)There are several features of the rock that you should

consider:2) What colour and texture will the rock have when the statue is

made?3) How difficult will the rock be to carve into shape?

(hardness of the rock)

4) Will the rock be damaged by acid rain? If so, will this matter?5) What will happen to the statue when it gets wet?6) Will the rock be damaged by changes in temperature?

Design your statue

• Explain the science behind your decision

FREEZE-THAW

BIOLOGICAL WEATHERING PHYSICAL WEATHERING

Chemical WEATHERING