Weathering and Soil Formation — Flashcards
ICSE · Class 7 · Geography
35 flashcards for Weathering and Soil Formation (ICSE Class 7 Geography) to test yourself on key terms and facts. Sample: "What is weathering?"
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What is weathering?
Answer
Weathering is the breaking down or dissolving of rocks and minerals on the surface of the Earth by physical and chemical processes. It is a static process because it happens where the rocks already ex…
What is denudation, and how is it different from weathering?
Answer
Denudation is a two-fold process that is both destructive and constructive. It includes the breaking down of rocks, the transport of weathered material, and its deposition in another place. Weathering…
What are the three main types of rocks?
Answer
The three main types of rocks are igneous rocks, sedimentary rocks, and metamorphic rocks. Igneous rocks form from cooled magma, sedimentary rocks form from layers of sediments, and metamorphic rocks …
What are igneous rocks? Give examples.
Answer
Igneous rocks are formed when molten magma solidifies either inside the Earth or on the surface of the Earth. They are the parent rocks of other rocks and make up about 85 per cent of the Earth’s crus…
Why are sedimentary rocks also called stratified rocks?
Answer
Sedimentary rocks are called stratified rocks because they are deposited in distinct layers or strata. They are formed from sediments collected over long periods in seas, lakes, rivers, and glaciers.
What are the three kinds of sedimentary rocks?
Answer
Sedimentary rocks are divided into mechanically formed, organically formed, and chemically formed rocks. Sandstone, shale, and clay are mechanically formed; coal, limestone, and coral are organically …
How do metamorphic rocks form?
Answer
Metamorphic rocks form when igneous or sedimentary rocks undergo a complete change in form because of extreme temperature and pressure. Tectonic movements and volcanic activity can also cause this cha…
What is the difference between rocks and minerals?
Answer
Rocks are aggregates of minerals and have no definite chemical composition. Minerals have a definite chemical composition and their own chemical and physical properties. Quartz and silicates are examp…
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