CBSE Class 7 Geography Inside Our Earth Worksheet

Fill in the blanks:

1. The remains of the dead plants and animals trapped in the layer of rocks are called ____________________.

2. Any natural mass of mineral matter that makes up earth’s crust is called ______________.

3. ______________ is a fiery red molten magma coming out from the interior of the earth on its surface.

4. _______________ are naturally occurring substances which have certain physical properties and definite chemical competitions.

5. The innermost layer of the earth is called _______________________.

6. ________________ is a very thick layer beneath the crust extending upto 2900 kilometre in depth.

7. The uppermost layer of the earth’s crust is called _____________________.

8. The main mineral constituents of the continental mass are ________________ and alumina.

9. The mantle extends up to a depth of ________________km.

10. The radius of the earth is ________________ kilometer.

11. The earth’s crust is made up of various types of _________________.

12. __________________ means fire.

13. ___________________________ means settle down.

14. ___________________________ means change of form.

15. Rocks formed in on the crust are called _______________________________________.

16. The innermost layer is the core with a radius of about __________ kilometer.

17. The process of transformation of the rock from one to another is known as the _________________.

18. The crust is about _________ kilometer on the continental masses and only ____ kilometer on the ocean floors.

Q1 Name 3 different layers of the earth?

Q2. What is sial , sima and nife?

Q3.Define rock, mineral?

Q4..What are sedimentary rocks ? How are they formed?

Q5. What are intrusive igneous rocks and extrusive igneous rocks?

Q6.Define rock cycle with the help of a diagram?

Q7.Give 2 example each of indigenous, sedimentary and metamorphic rocks?

Q8. What are the uses of minerals?

Q9. What is the depth of core?

Q10. Why are indigenous rocks called primary rocks?

Q11. Why is it said that rock cycle has neither a beginning nor an end?

Q.1 Fill in the blanks

a. The molten rock found below the earth surface is called __________ rock.

b. The process by which gas changes into liquid is called ___________

c. Rain caused by the rising of air heated on contact with hot ground is _________ rainfall.

d. The weight of the atmosphere pushing down on a unit area on the earth surface is called ________

e. The undesirable change in the air is called ____________

f. The physical and biological conditions in which organisms lives is _________.

g. The blanket of air that surrounds the earth is known as ___________

h. Mass of ocean water moving in a particular direction is called _________

i. The wind that blows from permanent high pressure belt to permanent low pressure belt are called ___________

Q.2 Complete the terms (definitions)

a. The state of the atmosphere at particular place at a particular time is weather where as climate is the ___________

b. Evaporation is the process by which ______________

c. Humidity is the amount of water vapour _____________

d. The remains of _____________________________ within layers of rocks are called fossils.

a. The falling of condensed _______________ is called precipitation.

Q.3 Match the following.

                A                                                      B

1. Sedimentary                     a. air from land moves towards sea

2. Igneous                            b. rock changed from its original form

3. Sea breeze                      c. rocks formed by cooling & hardening of Magma

4. Metamorphic                   d. air from sea moves towards land

5. Land breeze                    e. deposition and hardening of sediments in layers

Q.4 Solve the cross word puzzle and mark it (first one is done for you)

a. The parts of different spheres in which life exists together is - BIOSPHERE

b. The alternate rise and fall in the level of sea water _________

c. An instrument for measuring rainfall ______________

d. It is an instrument used to measure atmosphere pressure ___________

e. The lowest and densest layer of the atmosphere is known as the ___________

f. The top of the volcanic cone has a cuplike depression called a ___________

Fill in the blanks

1. The upper most layer over the earth's surface is ................ 

2. The oceanic crust mainly consists of  ................ & ................ 

3. Mantle which extends up to the depth of  ................ km.

4. The deepest mine in the world is in  ................ 

5. The continental mass mainly consist of  ................ and  ................ 

Choose the correct answers from the brackets

1. The core is rich in nickel and iron and is therefore also called the ................ (Nife, Sima, Niro)

2. The molten rock inside the surface of the earth is called ................
(Igneous rock, sedimentary rock, metamorphic rock)

3. Sedimentary rocks contains ................ 
(magma, fossils, air)

Answer the following questions

1. What are fossils?

2. What are sediments?

3. Distinguish between the following: a. Igneous and Sedimentary rocks