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Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids

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conclusion you must answer the question which you set out to<br />

investigate at the start.<br />

KEY CONCEPTS<br />

• The rocks on the surface of the Earth form a crust that<br />

covers the whole planet.<br />

• The continents are part of the crust, <strong>and</strong> the bottom of the<br />

oceans are part of the crust too.<br />

• Rocks break up into small grains.<br />

• The remains of living things mix with the grains <strong>and</strong><br />

together they form soil.<br />

• Three types of soil are s<strong>and</strong>y soil, clay soil <strong>and</strong> loam soil.<br />

REVISION:<br />

1. Label the layers of Earth on following diagram:<br />

Chapter 2. Surface of the Earth<br />

123

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