Rocks, Soil and Minerals Worksheet-6

Rocks, Soil and Minerals Worksheet-6

Multiple-Choice Question:

1. Molten rock that flows out when a volcano erupts is known as:

(A) Lava                      (B) Magma                 (C) None of these

2. ____ are formed by cooling and solidification of molten rocks.

(A) Igneous rocks

(B) Sedimentary rocks

(C) Metamorphic rocks

3. ______ rocks cover the ¾ of the earth’s surface.

(A) Metamorphic      (B) Igneous                 (C) Sedimentary

4. Which of the following mineral/s is/are present in sandstone?

(A) Quartz                   (B) Feldspar               (C) Magnesium

5. Which of the following layer of soil has the higher concentration of humus?

(A) Bedrock                (B) Subsoil                  (C) Topsoil

6. The monument in the given picture is situated in Delhi. It is made up of:

(A) Sandstone and Marble

(B) Granite and Marble

(C) Marble and Shale

Multiple Choice Questions (with more than one option):

7. Depending on the process of their formation, rocks are classified as:

      (A) Igneous rocks                                            (B) Hard rocks

      (C) Sedimentary rocks                                   (D) Metamorphic rocks

      (E) Soft rock

8. Mark the metallic mineral/s.

(A) Gold                       (B) Gypsum                (C) Aluminium

(D) Silver                     (E) Copper

9. True/False:

a.      All rocks are made up of minerals.

b.      Rocks are of different varieties.

c.      The molten rock inside the earth’s crust is known as magma.

d.      Granite is formed by slow cooling of lava.

e.      Asphalt is a sedimentary rock.

f.       Talc is the softest mineral.

g.      The chemical substances that are formed due to natural processes within the earth are known as minerals.

h.      The roots of some big trees grow down into the subsoil.

i.       Humus provides all the necessary nutrients to the plants and increases the ability of the soil to

Miscellaneous Questions:

10. Look at the given figure carefully and name the minerals from which the following things are made.

A) G _ _ P _ _ T _

B) _ _ L _

C) C _ _ N _ C _ _ Y

D) Q _ _ R _ _

E) _ _ L _ C _

F) T _ _ _ S _ _ _

G) S _ _ _ C _

H) _ R _ _

Fill in the blanks:

11. The innermost layer of the Earth is known as _____.        
12. The Acasta gneiss is an oldest known ____ rock in Canada which is 3.96 billion years old.       

Answer Key:

(1)     (A)

(2)    (A)

(3)    (C)

(4)    (A)

(5)    (C)

(6)    (A)

(7)    (A,C,D)

(8)    (A,C,D,E)

(9)    a.-True; b.-True; c.-False; d.-True; e.-True; f.-True; g.-True; h.-True; i.-True

(10)  A) Graphite; B) Talc; C) China clay; D) Quartz; E) Silica; F) Tungsten; G) Silica; H) Iron

(11)   Core

(12)  metamorphic