(i) People who study rocks and minerals are called gemologist.
Ans: People who study rocks and minerals are called geologists.
(ii) Igneous rocks are formed when pressure and temperature are applied on metamorphic rocks.
Ans: Metamorphic rocks are formed when pressure and temperature are applied on igneous and sedimentary rocks.
(iii) Sedimentary rocks are formed from little pieces of igneous rocks.
Ans: Sedimentary rocks are formed from little pieces of rock are broken down and worn away by wind and water.
(iv) All minerals are made of rocks.
Ans: Rocks are made of minerals.
(i) Igneous, sand, sedimentary, metamorphic
Ans: Sand
(ii) Marble, basalt, obsidian, Pumice
Ans: Marble
(iii) Marble, slate, quartzite, conglomerate
Ans: Conglomerate
(iv) Conglomerate, slate, shale, limestone
Ans: Slate
(v) Gemstones, magnetite, graphite, sandstone
Ans: Sandstone
(i) Rocks are made of this
Ans: Minerals
(ii) These are also called fire rocks
Ans: Igneous rocks
(iii) Talcum powder is made from this
Ans: Talc
(iv) Metals are obtained from rocks called this
Ans: Ores
(i) Name the three types of rocks.
Ans: The three types of rocks are -
(ii) What are minerals? Give two examples.
Ans: Minerals are naturally occurring chemical substances. Example - Silica and talc.
(iii) Which rock is used to make blackboards and roof tiles?
Ans: Slate rocks are used to make blackboards and roof tiles.
(iv) Give two examples of each of the following.
Ans:
(i) How are igneous rocks formed?
Ans: Igneous rocks are formed when magma cools down slowly and solidifies. Some igneous rocks are formed when the lava cools.
(ii) Briefly describe how sedimentary rocks are formed.
Ans: Sedimentary rocks are formed by the deposition of layers of rock particles one over the other. The little pieces of rocks are broken and worn away by wind and water.
(iii) Differentiate between shale and slate.
Ans:
Shale
Slate
(iv) How are metamorphic rocks formed?
Ans: Metamorphic rocks are formed from igneous and sedimentary rocks. When heat and pressure are applied to this rocks they change their form completely to form metamorphic rocks.
(v) Write one use each of any three minerals.
Ans: The various uses of minerals are -
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1. What are the different types of rocks? |
2. How are rocks and minerals related? |
3. What is the rock cycle? |
4. How can rocks be used as natural resources? |
5. How can we identify minerals and rocks? |
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