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NATURAL SCIENCES GRADE 5 The Surface of the Earth: Soil

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Rocks break up in many ways to form sand grains NATURAL SCIENCES GRADE 5 http://www.youtube.com/watch?v=99rGsXc9yWY

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Rocks get cracks in the surface Water makes cracks bigger Pieces of rock break off NATURAL SCIENCES GRADE 5

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A little bit of water is found in soil Roots of plants make the water acidic Acid water breaks the surface of the stone Rain water can also wear down the surface of stones NATURAL SCIENCES GRADE 5

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When water moves them When the wind blows them against other bigger stones When people and animals walk on a path and kick stones Small stones become sand NATURAL SCIENCES GRADE 5

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Plants need soil because: The soil anchors the plant The plant gets water from soil The plant gets minerals from soil Plants reproduce and the seeds need soil Can you remember what else plants need to grow? Lets watch the video http://www.youtube.com/watch?v=OQT6piZOX7c NATURAL SCIENCES GRADE 5

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Animals need soil because: The soil is their habitat Animals need plants to survive NATURAL SCIENCES GRADE 5

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Earths crust has different layers The layers are arranged in a specific order 1. Topsoil 2. Subsoil 3. Rock NATURAL SCIENCES GRADE 5

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Top layer of soil Where plants grow Animals live here Dark in colour Takes a very long time to form Made up of: small sand grains (broken down rocks) plant and animal matter air Water NATURAL SCIENCES GRADE 5

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Layer beneath the topsoil Lighter in colour than top soil Roots of trees anchor themselves Made up of: bigger rock pieces small parts from top soil NATURAL SCIENCES GRADE 5

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Bottom layer of land Big pieces of solid material Very deep down, the rock pieces become bigger too Rock

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Many animals live in soil Earthworms movements help to loosen soil particles More air available Animals that live here are a source of food for other animals NATURAL SCIENCES GRADE 5

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http://www.youtube.com/watch?v=dHX_kQGfmpQ NATURAL SCIENCES GRADE 5

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Inc, Microsoft Office clip art www.gardenguides.comwww.gardenguides.com http://www.agric.wa.gov.au/PC_92461.html (image) http://www.agric.wa.gov.au/PC_92461.html boral.com.au (image) http://valialaverkin.blogspot.com (image) http://valialaverkin.blogspot.com savvyhomeblog.com (image) www.factmonster.com (image) www.env.go.jp (image) www.edupic.net (image) www.edupic.net http://www.kidsdiscover.com/free-lesson-plans/ http://www.youtube.com/watch?v=dHX_kQGfmpQ http://www.youtube.com/watch?v=99rGsXc9yWY http://www.youtube.com/watch?v=OQT6piZOX7c www.thunderboltkids.com CAPS Natural Sciences and Technology Grade 5 Barnard T, Bevan W, Collett H, McKay R, Turley C. 2013. Oxford Successful Natural Science Grade 5 Leaners Book. Cape Town: Oxford University Press NATURAL SCIENCES GRADE 5