Rocks, Soil and Minerals Worksheet-4

Rocks, Soil and Minerals Worksheet-4

 

Multiple-Choice Question:

  1. The Earth’s core is made up of:

(A) Volcanoes             (B) Molten rock         (C) Sand

 

  1. Which of the following is most useful for the growth of plants?

(A) Humus                  (B) Sand                      (C) Small rocks

 

  1. Which of the following igneous rock/s is/are used to make kitchen counters, floor etc.?

(A) Obsidian               (B) Granite                  (C) Pumice

 

  1. Which of the following statement is true for conglomerate?

(A) It is formed by rounded stones such as pebbles, gravel and boulders cemented together into a mass

(B) It is formed by quick cooling of lava.

(C) It is a metamorphic rock

 

  1. Which of the following is the lowest layer of the soil?

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

 

  1. Which of the following pie chart represents the fraction of sedimentary rocks that cover the earth’s surface? The shaded part represents the fraction.

(A)             (B)               (C)

 

  1. The monument in the given picture is situated in Mumbai, Maharashtra. It is made up of:

(A) Granite, igneous rock

(B) Pumice, igneous rock

(C) Basalt, igneous rock

 

Multiple Choice Questions (with more than one option):

  1. Which of the following sedimentary rock/s is/are used in cement?

(A) Conglomerate      (B) Shale                      (C) Sandstone

(D) Limestone            (E) Gypsum

 

  1. True/False:

a.      Core is the middle layer of the earth.

b.      Graphite is used to make pencil leads.

c.      Magma is the molten rock which flows out of the earth’s core when a volcano erupts.

d.      Obsidian is formed by cooling of lava.

e.      Sandstone is a hard rock.

f.       Igneous rocks contain fossils.

g.      Metamorphic rocks are formed due to the chemical changes only.

h.      Bedrock contains large pieces of rock.

i.       Subsoil form a layer below bedrock and contains large rock.

 

  1. Match the column.

 

Miscellaneous Questions:

  1. Identify the different layers of soil on the basis of its composition.

A) H _ _ _ S              B) _ _ _ _ R               C) C _ _ _

D) _ _ N _                  E) G _ _ V _ _

 

Fill in the blanks:

  1. Molten rock inside the earth’s core is known as ____.     

 

Answer Key:

(1)     (B)

(2)    (A)

(3)    (B)

(4)    (A)

(5)    (C)

(6)    (B)

(7)    (C)

(8)    (B,D)

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

(10)  1-d; 2-c; 3-b; 4-a

(11)   A) Humus; B) Water; C) Clay; D) Sand ; E) Grave

(12)  magma