6th Grade Unit 8 The Earth Review Part 2

What is the name given to the rocks being worn away by wind, frost, rain and temperature changes?

The picture shows the preserved remains of a spider found in limestone.

Write down the name given to the preserved remains of living things found in rock.

Remains of mammals and spiders are found in the same rocks.

Scientists have made these two observations:

• remains of mammals are only found in upper layers of rock

• remains of spiders are found in all layers of rock

What two conclusions can be made from these observations?

Tick (/) two boxes.

• mammals did not live at the same time as spiders

• spiders existed before mammals

• mammals could live in the same place as spiders

• mammals developed from spiders

• the spiders were eaten by the mammals

Sedimentary rocks are formed in layers.

Look at the diagram of layers of sedimentary rocks.

Which layer has the youngest fossils?

Metamorphic rocks do not normally contain fossils.

Tick (/) the box next to the correct explanation.

• Animals did not live in areas where metamorphic rocks were formed

• Metamorphic rocks are formed when molten rock cools.

• Metamorphic rocks were formed before there was life on Earth

• Metamorphic rocks were formed under high temperatures and pressures

The diagram shows a cross - section of rocks in three different locations.

Fossils are found in the layers of rocks.

Look at the encircled picture of one of the fossils.

This fossil is the oldest shown in the diagram. Explain how you can tell.

The fossil is found in a sedimentary rock.

Which is the sedimentary rock in the list?

• basalt

• granite

• marble

• sandstone

Complete the sentence to explain how metamorphic rocks form.

Metamorphic rocks form when other rocks are changed by ………………………… and ………………………..

Tick (/) 2 options.

• heat

• ice

• water

• pressure

• wind

Which is the centre of the Earth?

• core

• crust

• mantle

Which part is made of liquid rock?

• core

• crust

• mantle