Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids
Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids
Cement is also made from shale. The shale is crushed to a powder and heated in akiln (a kind of stove). Black shale rock is also avery important source of oil and natural gas all over the world. KEY CONCEPTS • Sedimentary rocks form when small grains of rock, mud and sand form layers and become compacted over a very long time. • Rock breaks into small grains through the process called weathering. • Sedimentary rock can be identified as it has visible layers. • Examples of sedimentary rock are shale, sandstone and limestone. • Sedimentary rocks have dierent uses. REVISION: Complete the following sentences using words from the Word box. Write the sentences out completely. Word box: use some of these words to complete the sentences. • grains • wind • water • sediment • sandstone • limestone • shale • weathering 138 Earth and Beyond
1. Weathering breaks grains of rock of big rocks. _______ and _______ move these grains on top of each other in layers. A layer of rock grains is called a______. Wind, water, sediment 2. Over many years, the ______ become stuck together and we get sedimentary rock. Three types of sedimentary rock are ______, _______and _______. Grains, sandstone, limestone, shale 3. Explain how you would identify sedimentary rock in the natural world around you. Sedimentary rock has visible layers which are often dierent colours, so look for rock which has these layers in it. 4. Explain the dierence between erosion and deposition. Provide a drawing to accompany your answer. Erosion is when something, normally rock, is gradually worn away over time by wind, water or other animals. Deposition is when wind or water carries sand along and then drops it (deposits) in another place where it also gradually builds up over time. 5. Use the space below to draw a series of drawings to show how a rock is broken down into smaller grains over time. Label your drawing to explain the processes that are taking place to break down the rock. Learners drawings will vary, but there should be more than one drawing. The first drawing should show a big rock, then subsequent drawings should show smaller and smaller rocks, until there are coarse grains. Labels to include could be Erosion due to wind, Erosion due to water, Weathering due to wind and water, Weathering due to impact from animals. Chapter 3. Sedimentary rocks 139
- Page 96 and 97: Imagine we could cut aslice out of
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- Page 106 and 107: VISIT Rocks erode to form soil (vid
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- Page 132 and 133: Answer: Crust, mantle, core. 2. Wha
- Page 134 and 135: 3 Sedimentary rocks VISIT Dierent r
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- Page 144 and 145: A sculpture made from limestone. 10
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- Page 152 and 153: VISIT How are fossils formed? goo.g
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1. Weathering breaks grains of rock of big rocks. _______ <strong>and</strong><br />
_______ move these grains on top of each other in layers. A<br />
layer of rock grains is called a______.<br />
Wind, water, sediment<br />
2. Over many years, the ______ become stuck together <strong>and</strong> we<br />
get sedimentary rock. Three types of sedimentary rock are<br />
______, _______<strong>and</strong> _______.<br />
Grains, s<strong>and</strong>stone, limestone, shale<br />
3. Explain how you would identify sedimentary rock in the<br />
natural world around you.<br />
Sedimentary rock has visible layers which are often dierent<br />
colours, so look for rock which has these layers in it.<br />
4. Explain the dierence between erosion <strong>and</strong> deposition.<br />
Provide a drawing to accompany your answer.<br />
Erosion is when something, normally rock, is gradually worn<br />
away over time by wind, water or other animals. Deposition is<br />
when wind or water carries s<strong>and</strong> along <strong>and</strong> then drops it<br />
(deposits) in another place where it also gradually builds up<br />
over time.<br />
5. Use the space below to draw a series of drawings to show<br />
how a rock is broken down into smaller grains over time.<br />
Label your drawing to explain the processes that are taking<br />
place to break down the rock.<br />
Learners drawings will vary, but there should be more than<br />
one drawing. The first drawing should show a big rock, then<br />
subsequent drawings should show smaller <strong>and</strong> smaller rocks,<br />
until there are coarse grains. Labels to include could be<br />
Erosion due to wind, Erosion due to water, Weathering due to<br />
wind <strong>and</strong> water, Weathering due to impact from animals.<br />
Chapter 3. Sedimentary rocks<br />
139
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