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Lesson planning guide H2 Cool rocks? Learning objectives i ii iii iv v Igneous rocks crystallise from molten rock called magma. Molten magma reaching the Earth’s surface is called lava. Magma that cools quickly forms igneous rocks with small crystals. Lava/magma that cools slowly forms igneous rocks with large crystals. Igneous rocks contain different minerals, this gives them different colours (red only: and densities). Scientific enquiry vi vii Model how rate of cooling affects crystal size. (Framework YTO Sc1 8a) Use first hand and secondary data. (Framework YTO Sc1 8c) Suggested alternative starter activities (5–10 minutes) Recap last lesson Share learning objectives Brainstorming Capture interest (1) Capture interest (2) Ask pupils to work in groups to make a list of five reasons why different types of sedimentary rock are different from each other. Find out about igneous rock Find out how they are formed Be able to use a range of first hand experience, secondary sources of information and ICT. (Sc1) Pupils work in groups to brainstorm the questions ‘Where does the material erupting from a volcano come from?’ and ‘What are the different materials that come out of a volcano?’ Pass pieces of pumice around the class. Ask for ideas about how it was formed. Show video clips of volcanic eruptions of Monserrat and Hawaii volcanoes. Catalyst Interactive Presentations 2 Suggested alternative main activities Activity Learning objective see above Description Textbook H2 i, ii, iii, iv and v Activity H2a Practical Activity H2b Practical i, iii, iv and vi Activity H2c Paper i, ii, v and vii Teacher-led explanation and questioning OR pupils work individually, in pairs or in small groups through the in-text questions and then onto the end-of-spread questions if time allows. Igneous rocks Pupils investigate the size of crystals produced when igneous rocks form using salol Comparing igneous rocks Pupils compare how the chemical composition affects the colour (Help) and the densities if igneous rocks (Core/Extension) Volcano composition Pupils interpret data about the relative composition of four igneous rocks and relate it to different types of volcanic activity. i and v Approx timing Target group C H E S 20 min R/G G R S 30 min 20 min 10 min ( ) Suggested alternative plenary activities (5–10 minutes) Review learning Sharing responses Group feedback Word game Looking ahead Pupils identify a rock as sedimentary, metamorphic or igneous from a description. Model crystal size and cooling rates with pupils representing atoms sticking together with time to form crystals. Pupils work in groups to match the physical properties and origins of igneous rocks, using data from Activity H2b. Pupils sort igneous rocks into rapidcooling types and slow-cooling types. Pupils work in groups of 3 or 4 to brainstorm what happens to rocks over the passage of millions of years. Learning outcomes Most pupils will … Some pupils, making less progress will … Some pupils, making more progress will … describe volcanic activity describe the characteristics of igneous rocks explain that igneous rocks are formed when lava or magma solidifies explain how fast cooling gives small crystals and slow cooling gives large crystals assign igneous rocks to two main groups, dense iron rich or less dense silica rich. describe volcanic activity name granite and basalt as examples of igneous rocks begin to relate crystal size in granite and basalt to rate of cooling. assign igneous rocks to two main groups, dense iron rich or less dense silica rich. explain in terms of the particle model how different rates of cooling results in the formation of different types of igneous rocks relate chemical composition of magma to types of volcanic activity. Key words igneous rock, magma, lava, basalt, granite, red only: density, volcano, extrusive, intrusive Out-of-lesson learning Homework H2 Textbook H2 end-of-spread questions Activity H2c Read about volcanic eruption-newspaper articles © Harcourt Education Ltd 2004 Catalyst 2 This worksheet may have been altered from the original on the CD-ROM. Sheet 1 of 1