5. Igneous rocks are formed by volcanoes.when the volcano erupts the lava dries on the land and becomes what we call Igneous rock.

6. Sedimentary rock is formed by wind and water. The layers of earth build up during a period of time. The pressure of the water causing the layers of earth to turn to what we call Sedimentary rock.

7. A Metamorphic rock was once a Sedimentary rock or a Igneous Rock.The pressure of the water and heat causes the rock to turn into what we call Metamorphic rock.

9. Freeze thaw weathering Onion skin weathering Chemical weathering Physical weathering

10. Freeze thaw weathering is caused by water getting into the cracks of the rocks.when it is around freezing point the water will turn to ice.the ice will expand and start to crack the rock. When this repeatedly happens the rock will eventually break into bits.

11. Onion skin weathering is caused by repeatedly heated and cooled. During the day the rock expands because of the heat. At night the rock gets smaller because it is cold. This cause the rock to start to peel like skin.

12. Chemical weathering is cause by acid rain. The acid rain reacts with the object and my make it change shape.

13. Physical weathering is caused when a plant starts to grow in side the rock. The roots grow down though the cracks in the rock. Getting bigger therefore causing the rock to break in to bits.

15. Message from Mr M Some good work and presentation Lynsey. Nice use of the sound effects – just don’t use too many! Erosion does not have a T in the middle I liked the nice colours and balance between text and pictures A really good piece of work A1