Q.1 A. Fill in the blanks
from bracket. - 4
(vitamins, , strong, soft, hard,
balanced, sugar)
1. Calcium makes our bones strong .
2. food stuff that taste sweet contain Various kinds of sugar.
3. vitamins in our fond give us the ability to resist diseases.
4. A diet that provide all the constituents of food in the right
proportion is call a balanced diet.
B. match the following. - 5
Group 'A' Answer Group "B"
1. Proteins ( c ) a.
oil
2. Vitamins ( b ) b.
Bran of Cereals
3. Minerals ( e ) c.
pulses
4. Fats ( a ) d.
Jowar
5. starchy food ( d ) e.
Iron
C. True or false? -3
1. Dead plants and animals are abiotic - False
2. It is necessary to conserve biodiversity – True
Q.2. A. Classify the
following as natural or man-made. -3
|
Natural |
Man-made |
|
Horse Sunlight trees |
Book Pen brick |
book, horse, pen, Sunlight,
brick, trees
B. Answer the following
questions. - 4
1. Describe the lifecycle of
birds.
Answer –Both the parents build the nest for laying eggs. The female bird
lays the eggs in the nest. She incubates the eggs for some time till the young
ones hatch out of the eggs. The hatchlings are cared for by both the parents.
They are fed by mother as well as father. When the young ones develop wings and
are able to fly, they leave the nest and go away from the parents.
2. Give two causes of air pollution. - 2
Answer- (1) Industries and
factories burn fuel and this causes smoke and pollutant
(2) Vehicles during
transport emit poisonous gases and particles. The slow burning of fuels produces
lots of carbon dioxide.
C. Give reasons.
1. The number of wild
animals is falling day by day.
Answer- Due to human
interventions, many food chains and food webs are disturbed. Forests are
cleared for making land available. Due to loss of forest, wild animals are
displaced. Due to climate change and global warming, natural cycles are also
disturbed causing survival of wild animals difficult. Hunting and poaching of
wild animals have also reduced their numbers significantly. All these factors
have led to fall in the number of wild
animals.
