Environmental Studies Worksheet-20
A. 2/3 B. 1/4 C. 3/4 D. 1/2
A. Cement, bricks and gravel B. Baked bricks
C. Mud and straw D. Ice
A. Morning B. Evening C. Night D. Day
A. Recycle materials such as paper, metals, etc.
B. Use organic manure to maintain the fertility of the soil
C. Use fertilizers and pesticides excessively in farms
D. Fix catalytic converters to motor vehicles
A. From the rotting remains of tiny sea creatures that lived millions of years ago.
B. From the rotting remains of birds that lived millions of years ago.
C. From the lava of volcanoes.
D. From the burned rocks and minerals.
A. Condensation B. Crystallization
C. Evaporation D. All of these
A. It is known as Jugad
B. It is a means of low cost transportation in India
C. It is made by using waste material
D. It is registered with Regional Transport Office.
A. A mild storm with swift winds and a few rain drops
B. A violent storm with strong winds and heavy rains
C. A storm with strong show
D. A dust storm
(i) Both boil at 100°C.
(ii) Both have same temperature.
(iii) When heated, the ice cubes will directly change to steam.
(iv)Both are different states of water.
A. (i) & (ii) B. (i) & (iv) C. (ii) & (iv) D. (i) & (iii)
A. Wind force B. Earthquake
C. Temperature change D. Vegetation
(1)–B; (2)–D; (3)–D; (4)–C; (5)–A; (6)–C; (7)–D; (8)–B; (9)–B; (10)–C