D. Answer the following questions in brief.
1. What is the special feature of sedimentary rocks?
2. How are metamorphic rocks formed?
3.
What is lava?
4. Why are igneous rocks called the primary rocks?
5. What are sediments?
Answers
Answer:
sedimentary rocks are Basanite, Limestone, Coal, Sandstone, Novaculite and many more. The different features of sedimentary rocks are: They are deposited in layers as strata, forming a structure called bedding.
ans. 2 Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. Conditions like these are found deep within the Earth or where tectonic plates meet.
ans 3 Lava is molten rock that has been expelled from the interior of a terrestrial planet or a moon. Magma is generated by the internal heat of the planet or moon and it is erupted as lava at volcanoes
ans 4 Rocks which are formed by solidification of magma are known as primary rocks. They represent the rocks which directly or indirectly provided materials for the formation of other types of rocks. ...
ans 5 Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles.