Question

SCIENCE 5
B. Fill in the blanks.
1.
is formed when the magma cools down quickly on reaching the
Earth's surface.
2. Rock formed from the deposition of sand particles is called
3. This sedimentary rock is formed from solidified clay; it is called
4.
is formed from sandstone that is rich in quartz.
5. Precious stones like diamond, ruby, sapphire, emerald and topaz are obtained from
6. Magnetite is believed to have been discovered by
a Greek shepherd​

Answer 1

Answer:Rocks that formed from magma are called igneous rocks. ... They are, in decreasing quantity, 1 oxygen, 2 silicon, 3 aluminum, 4 iron, 5 ...

Explanation:

Answer 2

Answer:

1.intrusive rocks

2.sediments

3.Shale

4.Quartzite

6.Magnet

Explanation:

1.Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet. When lava comes out of a volcano and solidifies into extrusive igneous rock, also called volcanic, the rock cools very quickly.

2.Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.

3.Shale is one of the most common sedimentary rocks. It is composed of silt or clay that has been compacted or squeezed together to form a solid rock. Shale is usually found in thin layers.

4.Quartzite is a metamorphic rock formed when quartz-rich sandstone or chert has been exposed to high temperatures and pressures.

5.Most gemstones form in the Earth’s crust, approximately 3 to 25 miles beneath the Earth’s surface. Two gemstones, diamonds and peridot, are found much deeper in the Earth. Diamond forms in “kimberlite pipes” that originate in the Earth’s mantle (>125 miles) and end at the surface. Molten magma running through these pipes usually reaches the surface as lava and cools off, but if it doesn’t reach the surface, it cools more slowly, crystallizes, and forms coarse-grained minerals.

6.Magnet' is derived from the legend of Magnes, or from the territory of Magnesia. Pliny states that Magnes, the shepherd, discovered it, and the legend told of him is that while carrying a message over Mount Ida he felt his feet clinging to the earth, to the iron ore which lay thickly upon the hill.

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