Gr 3rd Sub: EVS Revision for Yearly Exam

Gr 3^rd Revision Yearly Exam

Fill in the blanks:

a) Sandy soil is used for construction.

b) Soil is formed by weathering of rock.

c) Topsoil is the uppermost layer of soil.

d) Subsoil contains small particles such as sand and silt.

e) The layer of the bottom of soil is called bedrock.

f) Sandy soil is granular soil that contains small rocks and mineral particles.

g) Loamy soil is composed of sand, silt and clay

h) Clayey soil can holds lots of water.

i) Cutting down of large number of trees is known as deforestation.

j) Planting of many trees is known as Afforestation.

k) When the top layer of the soil is washed away by natural forces is called soil erosion.

l) Besides the natural forces, deforestation is a cause of soil erosion.

m) Soil is the natural resource.

n) The organs that we can see are our external organs.

o) The organs that we cannot see are internal organs.

p) Skull is a hard bony covering that protects the brain.

q) Brain is an internal organ located in the head.

r) Heart is located on the left side of the chest.

s) The heart pumps blood throughout the body.

t) Stomach is located inside our abdomen.

u) Kidneys are a pair of bean-shaped organs.

v) Kidneys remove the waste products from the blood in the form of urine.

w) Lungs are the pair of spongy, air filled organs.

x) All the muscles together form the muscular system.

y) There are 206 bones in our body.

z) Skeletal system protects the internal organs from injury.

Standard 3