Question

Please answer all these questions
Class 7 , Chapter 2 .​

Answer 1

Answer:

A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter.

A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age.

We cannot go to the centre of the earth. Answer: Since the temperature and pressure increase enormously as we go deeper and deeper inside the earth, we cannot go to the centre of the earth. ... Answer: Because of extreme heat and pressure, limestone undergoes a change in its form and turns into marble.

The two main categories of igneous rocks are extrusive and intrusive. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.

Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.

Making Cement (Limestone) (Sedimentary Origin)

Writing (Chalk) (Sedimentary Origin)

Sediment is solid material that is moved and deposited in a new location.

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.

Because of extreme compression and hardening of the particles of sediment which are deposited by wind, water etc. Limestone is changed into marble. Answer: Because of extreme heat and pressure, limestone undergoes a change in its form and turns into marble.

hot molten or semi-fluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.

Answer 2

Answer:

a) A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed.

b)A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, 

c)Since the temperature and pressure increase enormously as we godeeper and deeper inside the earth, we cannot go to the centre of the earth. ... Answer: Because of extreme heat and pressure, limestone undergoes a change in its form and turns into marble

d)The two main categories of igneous rocks are extrusive and intrusive.Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet

e) Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earliermetamorphic form. Metamorphic rocks form whenrocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.

f)Making Cement (Limestone) (Sedimentary Origin)

Writing (Chalk) (Sedimentary Origin)

Building Material (Sandstone) (Sedimentary Origin)

Bath Scrub (Pumice) (Igneous Origin)

g)Sediment is solid material that is moved and deposited in a new location. Sediment can consist of rocks and minerals, as well as the remains of plants and animals.

h)Sedimentary rocks are formed whensediment 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.

i)Because of extreme compression and hardening of the particles of sediment which are deposited by wind, water etc. Limestone is changed into marble. Answer: Becauseof extreme heat and pressure, limestoneundergoes a change in its form and turnsinto marble.

j)Lava, magma (molten rock) emerging as a liquid onto Earth's surface. The term lava is also used for the solidified rock formed by the cooling of a molten lavaflow. ... The higher the lava's silica content, the higher its viscosity.

Explanation:

mark me as the brainliest