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CBSE Class 5  >  Class 5 Notes  >  Science   >  Worksheet Solutions: Rocks And Minerals - 2

Worksheet Solutions: Rocks And Minerals - 2

Q1: Rewrite these sentences correctly.

(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 to igneous and sedimentary rocks.

Q1: Rewrite these sentences correctly.

(iii) Sedimentary rocks are formed from little pieces of igneous rocks.
Ans: Sedimentary rocks are formed from little pieces of rock that are broken down and worn away by wind and water.

(iv) All minerals are made of rocks.
Ans: Rocks are made of minerals.

Q2: Choose the odd one.

(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

Q3: Give one word answer.

(i) Rocks are made of this
Ans: Minerals

(ii) These are also called fire rocks
Ans: Igneous rocks

Q3: Give one word answer.

(iii) Talcum powder is made from this
Ans: Talc

(iv) Metals are obtained from rocks called this
Ans: Ores

Q4: Short Answer Questions.

(i) Name the three types of rocks.
Ans: The three types of rocks are:

  • Igneous rock
  • Sedimentary rock
  • Metamorphic rock

(ii) What are minerals? Give two examples.
Ans: Minerals are naturally occurring substances found in the Earth's crust. Examples - 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.

Q4: Short Answer Questions.

(iv) Give two examples of each of the following.
Ans:

  • Igneous rocks - Granite, Pumice
  • Metamorphic rocks - Marble, Slate
  • Sedimentary rocks - Shale, Sandstone

Q5: Long Answer Questions.

(i) How are igneous rocks formed?
Ans: Igneous rocks are formed when molten rock (magma or lava) cools and becomes solid. If magma cools slowly beneath the Earth's surface, larger crystals may form; if lava cools quickly on the surface, the crystals are small or may not be visible.

(ii) Briefly describe how sedimentary rocks are formed.
Ans: Sedimentary rocks are formed by the deposition of layers of small particles such as sand, mud and clay. These particles are carried by wind, water or ice and settle in layers. Over long periods, the layers are pressed and cemented together to form solid rock.

(iii) Differentiate between shale and slate.
Ans: 
Shale

  • Shale is a sedimentary rock made from the deposition of mud and clay.
  • It is used in making tiles and bricks.

Slate

  • Slate is a metamorphic rock formed from shale when heat and pressure change its structure.
  • It is used to make blackboards and roof tiles.
Q5: Long Answer Questions.

(iv) How are metamorphic rocks formed?
Ans: Metamorphic rocks are formed from igneous or sedimentary rocks when they are changed by heat and pressure inside the Earth. These conditions alter the minerals and texture of the original rock to make a new, harder rock.

(v) Write one use each of any three minerals.
Ans: The various uses of minerals are -

  • Potassium and nitrate minerals - used in making fertilisers to keep soil fertile.
  • Coal - used as a fuel for cooking and to generate electricity.
  • Gemstones - used to make jewellery. Example - Diamond and Ruby.
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FAQs on Worksheet Solutions: Rocks And Minerals - 2

1. What are the different types of rocks?
Ans. There are three main types of rocks: igneous, sedimentary, and metamorphic. Igneous rocks are formed from solidified magma or lava, sedimentary rocks are formed from the accumulation of sediment, and metamorphic rocks are formed from the transformation of existing rocks under high heat and pressure.
2. How are rocks and minerals related?
Ans. Rocks are composed of minerals. Minerals are naturally occurring inorganic substances with a specific chemical composition and crystal structure. Rocks are made up of different combinations of minerals, and the type and arrangement of minerals within a rock determine its characteristics.
3. What is the rock cycle?
Ans. The rock cycle is a continuous process of formation, transformation, and erosion of rocks on Earth's surface. It involves the processes of weathering, erosion, deposition, compaction, and cementation. Rocks can be broken down into sediments, which can then be transported, deposited, and compacted to form sedimentary rocks. These rocks can then undergo metamorphism to become metamorphic rocks, and through melting and solidification, they can become igneous rocks again.
4. How can rocks be used as natural resources?
Ans. Rocks have various uses as natural resources. For example, igneous rocks like granite and basalt are commonly used as construction materials due to their strength and durability. Sedimentary rocks like limestone and sandstone are used in the construction industry and can also be sources of valuable minerals. Additionally, rocks such as coal and petroleum are important sources of energy.
5. How can we identify minerals and rocks?
Ans. Minerals can be identified based on their physical properties such as color, luster, hardness, cleavage, and specific gravity. Rocks, on the other hand, can be identified by their texture, mineral composition, and overall appearance. Geologists often use various tests and observations, including microscopic examination, chemical tests, and field observations, to identify minerals and rocks accurately.
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Apr 19, 2026 Last updated
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