EVENTS
CONVENT HIGH SCHOOL
70,LALA LAJPAT RAI COLONY,
BAGH DILKUSHA
SLOT 1 science REVISION QUESTIONS
CLASS-7
A.Choose the correct option:-
(a) Insectivorous
plant are partial
a. Heterotrophs(
√ ) b. Chlorophyll
(b) It secrets bile juice in
a. Pancrease b.Gall Bladder(
√ )
(c) Silkworms
are caterpillars of
a. Sorting b. Silk
moth( √ )
(d) To make
pots, toys and statues.
a. Snady b.Clay( √
)
(e) A parasitic
plant with yellow, slender and tubular stem.
a. Cuscuta b.Parastie ( √ )
(f) A plant that
has both autotrophic and heterotrophic mode of nutrition.
a. Insectivorous
( √ ) b. Rhizobium
(g) Fat is completely digested in the
a. Stomach
b. small intestine( √ )
(h) Water from
the undigested food is absorbed mainly in the:
a. Stomach b. Large intestine(
√ )
(i)
In addition to the rock particles, the soil contains
a.
air and water( √ ) b. water and plants
(j)
The water holding capacity is the
highest in
a.
sandy soil b. clayey
soil ( √ )
(k)
Soil is formed through the process of
a.
weathering( √ ) b.decomposition
B.Fill in the blanks:-
1. Heterotopy 2.autotrophs ( √ )
(b) The food
synthesized by the plants is stored as 'starch'
1. Glycogen 2.Starch( √ )
(c) In
photosynthesis solar energy is captured by the pigment called 'chlorophyll'
1. Chlorophyll(
√ ) 2.Stigma
(d) During
photosynthesis plants take in 'carbon dioxide',.
1. Carbon
dioxide ( √ ) 2.Oxygen
(e) The largest
gland in the human body is liver.
1. Lungs 2.Liver ( √ )
(f) The stomach
releases hydrochloric acid and digestive juices which act on food.
1. Bile 2.Digestive( √ )
(g) The inner
wall of the small intestine has many finger-like outgrowths called villi
1. Villi ( √ ) 2.Pancrease
(h) Amoeba
digests its food in the Food vacuole
1. Contractile
vacuole 2. Food vacuole( √ )
(i)
The average weather taken over a long time is called climate.
1.
Climate(
√ ) 2.Weather
(j)
A place receives very little rainfall and the temperature
is high throughout the year, the climate of that place will be __hot__ and __dry__.
1.
Wet & dry 2.Hot & dry( √ )
(k)
The two regions of the earth with extreme climatic
conditions are polar region and tropical region.
1.
Polar region & tropical region ( √ ) 2.eastern
region & central region.
(a)
Digestion of starch starts in the stomach.
1.
False ( √ ) 2.True
(b)
The tongue helps in mixing food with saliva.
1. False 2.True
(√ )
(c)
The gall bladder temporarily stores bile.
1.
False 2.True ( √ )
(d)
The ruminants bring back swallowed grass into their mouth and chew it for some
time.
1.
False 2.True ( √ )
(e) The two region of earth eastern and central
are extreme climate condition
1. False( √ ) 2.True
(f) Amoeba
digests its food in the Food vacuole
1. False 2.True
( √ )
(g) Clayey soil has much smaller particles
1. False 2.True
( √ )
(h)Sandy
soil is fertile
1. False ( √ ) 2.True
(i)
Plastic bags and polythene bags destroy the fertility of soil
1. False 2.True
( √ )
(j)
Excessive use of pollutants and chemical make soil pure
1. False ( √ ) 2.True
(k) Compressed air is
used in the brake system for stopping trains.
1. False 2.True
( √ )
D.Answer
the following questions:-
Q.1. Why do organisms need to take food?
Ans.
Food is needed by all organisms for many purposes:
(a)
The main function of food is to help in growth.
(b)
Food provides energy for movements such as running, walking or raising our arm.
(c)
Food is also needed for replacement and repairing damaged parts of body.
(d)
Food gives us resistance to fight against diseases and protects us from
infections
Q.2
Where is the bile produced? Which component of the food does it help to digest?
Ans.
Bile is produced in liver. The bile juice stored in sac called the gall
bladder. It helps in the digestion of fats.
Q.3:Explain how soil is formed.
Ans. Soil is formed through the process of weathering. Weathering is a
process of physical breakdown and chemical decomposition of rocks and minerals
near or at the surface of the earth. This physical and chemical decomposition
is primarily done by wind, water, and climate. As a result of these processes,
large rock pieces are converted into smaller pieces and eventually to soil.
Q.4:Name
the elements that determine the weather of a place.
Ans.The elements that determine
the weather of a place are temperature, humidity, rainfall, and wind speed.
Q.5 :When
are the maximum and minimum temperatures likely to occur during the day?
Ans.The maximum temperature of
the day occurs in the afternoon while the minimum temperature occurs early in
the morning.
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Mrfarooqui