Rocks, Soil and Minerals Worksheet-4
(A) Volcanoes (B) Molten rock (C) Sand
(A) Humus (B) Sand (C) Small rocks
(A) Obsidian (B) Granite (C) Pumice
(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
(A) Topsoil (B) Subsoil (C) Bedrock
(A) (B) (C)
(A) Granite, igneous rock
(B) Pumice, igneous rock
(C) Basalt, igneous rock
Multiple Choice Questions (with more than one option):
(A) Conglomerate (B) Shale (C) Sandstone
(D) Limestone (E) Gypsum
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.
A) H _ _ _ S B) _ _ _ _ R C) C _ _ _
D) _ _ N _ E) G _ _ V _ _
Fill in the blanks:
(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