Weathering+and+erosion

= __**Weathering and erosion**__ I have combined this unit with Driving the rock cycle make sure you check the objectives on that page as well before the end of unit test! =




 * __Igneous rock__**

**[]** **the rock sphere is the lithosphere (this includes the crust and uppermost mantle.****Explain that the crust is made of plates.**   Observe an animation of convection in the mantle asking how this might effect the movement of the plates.    **[]**

observe the animation of continental drift [] Use these and further research to help you answer the questions on the worksheet.
 * Volcano animation:**
 * [] **

[|Rock cycle animation] __**Explore science**__ - [] join the year 8 class use the code given by the teacher __**Homework 1**__ is to ensure that you have the necessary plug ins to use the gizmo. Also for homework - have a play with the gizmo, write down the five most interesting facts you find!

__**Lesson worksheet**__


 * Scientific Background (Taken from explore learning) **

Rocks are classified into three main groups. //Igneous rocks// are rocks that crystallize as molten rock (magma or lava), cools, and hardens. //Sedimentary rocks// are formed from cemented rock fragments, chemical precipitates, and organic remains. //Metamorphic rocks// are formed when other rocks are altered by heat and pressure.The rock cycle describes how rocks can be transformed from one type into another. For example, a sedimentary rock such as limestone can be transformed into the metamorphic rock marble if it is buried deep in Earth’s crust and subjected to high temperature and pressure. If an igneous rock such as granite is uplifted and exposed on Earth’s surface, the action of plants, rain, ice, and snow will break it up into sediments. The sediments will be smoothed and rounded as they are carried to the ocean, and eventually they may be deposited on a beach. Over time, the beach sand may be buried under other layers of sediment and cemented into sandstone. Convection currents in Earth’s mantle provide the energy to keep the rock cycle moving. These convection currents cause the motion of tectonic plates. New crust is created in mid-ocean ridges and old crust is destroyed in subduction zones. Mountains are created along convergent and collisional plate boundaries. In these regions, rocks created deep below Earth’s surface are uplifted and exposed to the weathering forces of rain, sunlight, wind, ice, and plants. Over millions of years, these forces act to break down rocks into smaller particles, forming sediments and soil. The sediments are transported by rivers and streams to the ocean, where they are deposited in layers on the continental shelf. Over time, these layers are buried and harden into sedimentary rock.

__**PRACTICAL ACTIVITY**__

__Fossils__