Chemistry4 8H Rocks Flashcards Preview

Year 8 Science > Chemistry4 8H Rocks > Flashcards

Flashcards in Chemistry4 8H Rocks Deck (20)
Loading flashcards...
1

What will happen to the mass of a non-porous rock (interlocking grains) when placed in water?

It will stay the same.

2

What will happen to the mass of a porous rock when placed in water?

It will increase.

3

Name one type of sedimentary rock.

  • Sandstone
  • Limestone
  • Mudstone

4

Name one type of metamorphic rock.

  • Slate
  • Gneiss
  • Schist

5

Name the 4 layers of the Earth.

  • Inner core
  • Outr core
  • Mantle
  • Crust

6

What is the difference between magma and lava?

Magma is molten rock stored in the Earth's crust.

Lava is molten rock that has reached the surface.

7

What type of rock does magma and lava form?

Igneous rock

8

What is the main feature of igenous rocks?

They have crystals.

9

What is an "ore"?

Rock that is mined so that metal can be extracted.

10

Name the three types of weathering.

  • Biological weathering
  • Physical weathering
  • Chemical weathering

11

Describe how igneous rocks are formed.

Igneous rocks are formed when magma/lava cools.

12

Describe how sedimentary rock is formed.

Sediment is deposited in layers. Pressure causes the grains to cement together.

13

Describe how metamorphic rock is formed.

Sedimentary and igneous rock under the surface is put under heat and pressure.

14

Which types of rock have interlocking grains?

Igneous and Metamorphic

15

Which type of rock has rounded grains?

Sedimentary rock

16

Igneous rocks can form below or above the surface of the Earth. Describe the size of crystal for both types.

  • Rocks formed below the surface have LARGE crystals.
  •  Rocks formed above the surface have SMALL crystals.

17

In which type of rock are fossils found?

Sedimentary rock

18

Why are fossils not found in Igneous or Metamorphic rock?

There is too much heat.

19

What type of rock is this? How do you know?

Metamorphic. The layers have been distorted.

20