II. Very Short Answer Type Questions (in one word/a few words only);
1. What are seismic waves?
2. What do you mean by fossils?
3. What do SIAL and SIMA stand for?
4. Name the minerals of which the core of the earth is made up.
5. What do you mean by sediments?
6. What is asthenosphere?
7. Name the three layers present in the earth's interior..
8. What do you mean by rocksphere?
9. Give two types of igneous rocks.
10. What are metamorphic rocks?
Answers
Answer:
NO 1.
Explanation:
Seismic waves are waves of energy that travel through Earth's layers, and are a result of earthquakes, volcanic eruptions, magma movement, large landslides and large man-made explosions that give out low-frequency acoustic energy.
NO 2.
THE REMAINS OF A PREHISTORIC PLANT OR ANIMAL PRESERVED IN PETRIFIED FORM.
NO 3.
The name 'sima' was taken from the first two letters of silica and of magnesia. Comparable is the name 'sial' which is the name for the upper layer of Earth's crust (continental crust).
NO 4.
IRON AND NICKLE.
NO 5.
the matter that settles to the bottom of a liquid.
NO 6.
the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
NO 7.
The Earth is divided into three main layers. The dense, hot inner core (yellow), the molten outer core (orange), the mantle (red), and the thin crust (brown), which supports all life in the known universe. Earth's interior is generally divided into three major layers: the crust, the mantle, and the core.
NO 8.
These mainly prehistoric artifacts may have been created or selected, but altered in some way to perform their specific function, including carving and painting.
NO 9.
Intrusive and extrusive
NO 10.
Metamorphic rocks arise from the transformation of existing rock to new types of rock, in a process called metamorphism.
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