magma was forced into the crust near the original rock and heated it.) Lesson 8Hc: Weathering and erosion Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Moving rock Explaining: Resources n/a Students Recall some examples of physical Demonstrate the link between the from 8Hc observe what Heating and changes and of chemical changes. speed of movement of water and the cooling Exploring happens when Describe the effect of physical and size of fragments that it will carry, Students can Science. they drop biological weathering on using a jam jar two-thirds full with compare these hydrochloric Explain why rainwater is slightly acidic. water and a spoonful of sand, then a models with the acid on a range Describe the effect of chemical spoonful of gravel. way rocks of rocks weathering on rocks. weather. (limestone, Recall how weathered rocks are eroded Exploring: Acid and rocks marble and and explain how fragments get worn Students observe what happens when chalk, down during transport. they drop hydrochloric acid on a sandstone and Describe the link between the size of range of rocks (limestone, marble some igneous rock fragments carried and the water and chalk, sandstone and some and speed. igneous and metamorphic rocks). metamorphic Securing rocks). Describe how weathering can break up Explaining: Heating and cooling rocks. Demonstrate the effect of repeated Compare the fragment sizes that can cycles of hot and cold, using a glass be transported by wind, water and ice. rod or a corner of a chip of granite. Exceeding Describe features in limestone Plenary: Thinking about weathering landscapes and relate them to the way and erosion they were formed. Consider All Possibilities: One statue is much more weathered than another. (Possible answers: it has been in a different place; it has been exposed to different conditions; it is made of a different kind of rock.)
magma was forced into the crust near the original rock and heated it.) Lesson 8Hc: Weathering and erosion Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Recall some examples of physical changes and of chemical changes. Describe the effect of physical and biological weathering on Explain why rainwater is slightly acidic. Describe the effect of chemical weathering on rocks. Recall how weathered rocks are eroded and explain how fragments get worn down during transport. Describe the link between the size of rock fragments carried and the water speed. Securing Describe how weathering can break up rocks. Compare the fragment sizes that can be transported by wind, water and ice. Exceeding Describe features in limestone landscapes and relate them to the way they were formed. Starter: Moving rock Demonstrate the link between the speed of movement of water and the size of fragments that it will carry, using a jam jar two-thirds full with water and a spoonful of sand, then a spoonful of gravel. Exploring: Acid and rocks Students observe what happens when they drop hydrochloric acid on a range of rocks (limestone, marble and chalk, sandstone and some igneous and metamorphic rocks). Explaining: Heating and cooling Demonstrate the effect of repeated cycles of hot and cold, using a glass rod or a corner of a chip of granite. Plenary: Thinking about weathering and erosion Consider All Possibilities: One statue is much more weathered than another. (Possible answers: it has been in a different place; it has been exposed to different conditions; it is made of a different kind of rock.) Explaining: Heating and cooling Students can compare these models with the way rocks weather. Resources from 8Hc Exploring Science. n/a Students observe what happens when they drop hydrochloric acid on a range of rocks (limestone, marble and chalk, sandstone and some igneous and metamorphic rocks).
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