Name: What Are Rocks?
Uploaded: 2019-07-19
Duration: 3 min 42 s
Description: Rocks can be found anywhere. They can be as big as boulders or as small as pebbles. What are Rocks and what are they made up of. This and more in the video. Come, let's explore.

Question

Solve the crossword using the clues given below.
Clues
Across
1. Makes the 'lead' in pencils.
2. A green gemstone
3. Precious minerals
4. A layered rock
Down
5. Hard rock for flooring tiles
6. Used to build the Red Fort
7. Hardest rock
8. Very useful black mineral
9. Red gemstone
10. Used to build the Taj Mahal

Accepted Answer

Across
1. Many common substances like table salt and graphite are examples of minerals. Graphite makes the lead in pencils.
2. Gemstones are cut and polished to make jewellery. An Emerald is a green gemstone.
3. Gemstones are precious minerals that are cut and polished to make jewellery.
4. Shale is a sedimentary rock. It is made up of clay (a sticky soil) and mud particles solidified together and piled up in layers.

Down
5. When the magma cools slowly under the ground, it forms granites, a type of igneous rock. It is a hard rock used for flooring tiles.
6. Red Fort is made up of red sandstone. It is a type of sedimentary rock.
7. Diamond is the hardest rock. It is made up of carbon.
8. Minerals are building blocks of rocks. Coal is a very useful black mineral.
9. Ruby is a red gemstone. It is used in jewellery.
10. Marble is used to build the Taj Mahal. It is a transformed form of limestone, normally found in white colour

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