Page 1
CBSE VII | SCIENCE
Sample Paper – 2 Solution
CBSE
Class VII Science
Term 1
Sample Paper – 2 Solution
Time: 2 ½ hrs Total Marks: 80
SECTION A
1. Ans. Correct Option: [B]
Solution: The pulp cavity contains nerves and blood vessels.
2. Ans. Correct Option: [A]
Solution: Respiration in earthworm takes place through the skin.
3. Ans. Correct Option: [A]
Solution: Summer monsoon winds are monsoon winds which bring rainfall over
India.
4. Ans. Correct Option: [C]
Solution: The layer of the B horizon is hard and compact. It is rich in minerals.
5. Ans. Correct Option: [D]
Solution: The silk moth cuts open the cocoon at the end of the pupal stage. During
the pupal stage, the caterpillar is enclosed in the hard shell of silk fibres called the
cocoon.
6. Ans. Correct Option: [C]
Solution: Llama and Alpaca yield wool in South America.
7. Ans. Correct Option: [A]
Solution: This picture shows scouring by machine. Scouring involves the thorough
washing of the sheared skin to remove grease, dust and dirt.
8. Ans. Correct Option: [C]
Solution: Lime water contains calcium hydroxide which is a base. Bases are bitter
in taste.
9. Ans. Correct Option: [C]
Solution: Soda water is basic in nature. Bases change the colour of China rose
indicator to green.
Page 2
CBSE VII | SCIENCE
Sample Paper – 2 Solution
CBSE
Class VII Science
Term 1
Sample Paper – 2 Solution
Time: 2 ½ hrs Total Marks: 80
SECTION A
1. Ans. Correct Option: [B]
Solution: The pulp cavity contains nerves and blood vessels.
2. Ans. Correct Option: [A]
Solution: Respiration in earthworm takes place through the skin.
3. Ans. Correct Option: [A]
Solution: Summer monsoon winds are monsoon winds which bring rainfall over
India.
4. Ans. Correct Option: [C]
Solution: The layer of the B horizon is hard and compact. It is rich in minerals.
5. Ans. Correct Option: [D]
Solution: The silk moth cuts open the cocoon at the end of the pupal stage. During
the pupal stage, the caterpillar is enclosed in the hard shell of silk fibres called the
cocoon.
6. Ans. Correct Option: [C]
Solution: Llama and Alpaca yield wool in South America.
7. Ans. Correct Option: [A]
Solution: This picture shows scouring by machine. Scouring involves the thorough
washing of the sheared skin to remove grease, dust and dirt.
8. Ans. Correct Option: [C]
Solution: Lime water contains calcium hydroxide which is a base. Bases are bitter
in taste.
9. Ans. Correct Option: [C]
Solution: Soda water is basic in nature. Bases change the colour of China rose
indicator to green.
CBSE VII | SCIENCE
Sample Paper – 2 Solution
10. Ans. Correct Option: [B]
Solution: The air from the land towards the sea is called land breeze.
11. Ans. Correct Option: [A]
Solution: While reading a thermometer, we should not hold it by the bulb.
12. Ans. Correct Option: [B]
Solution: The bulb in the thermometer has mercury.
13. Ans. Correct Option: [C]
Solution: One of the most well-known periodic motions is that of a simple
pendulum.
14. Ans. Correct Option: [A]
Solution: Speed = Distance travelled/Time
Thus, in case of A, in the same amount of time, the distance travelled is more as
compared to that of B.
15. Ans. Correct Option: [B]
Solution: The speed is zero if the graph is a straight line parallel to the time axis.
SECTION B
16. Ans. Leguminous crops have root nodules which contain Rhizobium. Rhizobia
convert atmospheric nitrogen into nitrates. These nitrates mix with the soil and
enrich it. Thus, the soil gets enriched with nitrogen compounds.
17. Ans. The topsoil is rich in humus and minerals. It is the home for many living things
such as earthworms. It also contains decayed plant and animal remains. The
presence of minerals, living things and decaying plant and animal remains makes
the top soil fertile.
18. Ans. Yeasts are single-celled fungi. They respire anaerobically, i.e. they convert
glucose into alcohol in the absence of oxygen.
19. Ans.
1. Shearing is done only once in a year generally during the hot weather in
summer.
2. During shearing, the layer of hair along with a thin layer of skin which is dead is
removed. Hence, it does not hurt the sheep.
Page 3
CBSE VII | SCIENCE
Sample Paper – 2 Solution
CBSE
Class VII Science
Term 1
Sample Paper – 2 Solution
Time: 2 ½ hrs Total Marks: 80
SECTION A
1. Ans. Correct Option: [B]
Solution: The pulp cavity contains nerves and blood vessels.
2. Ans. Correct Option: [A]
Solution: Respiration in earthworm takes place through the skin.
3. Ans. Correct Option: [A]
Solution: Summer monsoon winds are monsoon winds which bring rainfall over
India.
4. Ans. Correct Option: [C]
Solution: The layer of the B horizon is hard and compact. It is rich in minerals.
5. Ans. Correct Option: [D]
Solution: The silk moth cuts open the cocoon at the end of the pupal stage. During
the pupal stage, the caterpillar is enclosed in the hard shell of silk fibres called the
cocoon.
6. Ans. Correct Option: [C]
Solution: Llama and Alpaca yield wool in South America.
7. Ans. Correct Option: [A]
Solution: This picture shows scouring by machine. Scouring involves the thorough
washing of the sheared skin to remove grease, dust and dirt.
8. Ans. Correct Option: [C]
Solution: Lime water contains calcium hydroxide which is a base. Bases are bitter
in taste.
9. Ans. Correct Option: [C]
Solution: Soda water is basic in nature. Bases change the colour of China rose
indicator to green.
CBSE VII | SCIENCE
Sample Paper – 2 Solution
10. Ans. Correct Option: [B]
Solution: The air from the land towards the sea is called land breeze.
11. Ans. Correct Option: [A]
Solution: While reading a thermometer, we should not hold it by the bulb.
12. Ans. Correct Option: [B]
Solution: The bulb in the thermometer has mercury.
13. Ans. Correct Option: [C]
Solution: One of the most well-known periodic motions is that of a simple
pendulum.
14. Ans. Correct Option: [A]
Solution: Speed = Distance travelled/Time
Thus, in case of A, in the same amount of time, the distance travelled is more as
compared to that of B.
15. Ans. Correct Option: [B]
Solution: The speed is zero if the graph is a straight line parallel to the time axis.
SECTION B
16. Ans. Leguminous crops have root nodules which contain Rhizobium. Rhizobia
convert atmospheric nitrogen into nitrates. These nitrates mix with the soil and
enrich it. Thus, the soil gets enriched with nitrogen compounds.
17. Ans. The topsoil is rich in humus and minerals. It is the home for many living things
such as earthworms. It also contains decayed plant and animal remains. The
presence of minerals, living things and decaying plant and animal remains makes
the top soil fertile.
18. Ans. Yeasts are single-celled fungi. They respire anaerobically, i.e. they convert
glucose into alcohol in the absence of oxygen.
19. Ans.
1. Shearing is done only once in a year generally during the hot weather in
summer.
2. During shearing, the layer of hair along with a thin layer of skin which is dead is
removed. Hence, it does not hurt the sheep.
CBSE VII | SCIENCE
Sample Paper – 2 Solution
20. Ans.
Type of fibre Burning smell
Artificial silk Smell of burning paper
Natural silk Smell of burning hair
21. Ans. No. The range of a clinical thermometer is 35°C to 42°C, while the boiling
temperature is far more than 42°C.
22. Ans.
(i) A bike moving with a constant speed:
(ii) A car parked on the road side:
Page 4
CBSE VII | SCIENCE
Sample Paper – 2 Solution
CBSE
Class VII Science
Term 1
Sample Paper – 2 Solution
Time: 2 ½ hrs Total Marks: 80
SECTION A
1. Ans. Correct Option: [B]
Solution: The pulp cavity contains nerves and blood vessels.
2. Ans. Correct Option: [A]
Solution: Respiration in earthworm takes place through the skin.
3. Ans. Correct Option: [A]
Solution: Summer monsoon winds are monsoon winds which bring rainfall over
India.
4. Ans. Correct Option: [C]
Solution: The layer of the B horizon is hard and compact. It is rich in minerals.
5. Ans. Correct Option: [D]
Solution: The silk moth cuts open the cocoon at the end of the pupal stage. During
the pupal stage, the caterpillar is enclosed in the hard shell of silk fibres called the
cocoon.
6. Ans. Correct Option: [C]
Solution: Llama and Alpaca yield wool in South America.
7. Ans. Correct Option: [A]
Solution: This picture shows scouring by machine. Scouring involves the thorough
washing of the sheared skin to remove grease, dust and dirt.
8. Ans. Correct Option: [C]
Solution: Lime water contains calcium hydroxide which is a base. Bases are bitter
in taste.
9. Ans. Correct Option: [C]
Solution: Soda water is basic in nature. Bases change the colour of China rose
indicator to green.
CBSE VII | SCIENCE
Sample Paper – 2 Solution
10. Ans. Correct Option: [B]
Solution: The air from the land towards the sea is called land breeze.
11. Ans. Correct Option: [A]
Solution: While reading a thermometer, we should not hold it by the bulb.
12. Ans. Correct Option: [B]
Solution: The bulb in the thermometer has mercury.
13. Ans. Correct Option: [C]
Solution: One of the most well-known periodic motions is that of a simple
pendulum.
14. Ans. Correct Option: [A]
Solution: Speed = Distance travelled/Time
Thus, in case of A, in the same amount of time, the distance travelled is more as
compared to that of B.
15. Ans. Correct Option: [B]
Solution: The speed is zero if the graph is a straight line parallel to the time axis.
SECTION B
16. Ans. Leguminous crops have root nodules which contain Rhizobium. Rhizobia
convert atmospheric nitrogen into nitrates. These nitrates mix with the soil and
enrich it. Thus, the soil gets enriched with nitrogen compounds.
17. Ans. The topsoil is rich in humus and minerals. It is the home for many living things
such as earthworms. It also contains decayed plant and animal remains. The
presence of minerals, living things and decaying plant and animal remains makes
the top soil fertile.
18. Ans. Yeasts are single-celled fungi. They respire anaerobically, i.e. they convert
glucose into alcohol in the absence of oxygen.
19. Ans.
1. Shearing is done only once in a year generally during the hot weather in
summer.
2. During shearing, the layer of hair along with a thin layer of skin which is dead is
removed. Hence, it does not hurt the sheep.
CBSE VII | SCIENCE
Sample Paper – 2 Solution
20. Ans.
Type of fibre Burning smell
Artificial silk Smell of burning paper
Natural silk Smell of burning hair
21. Ans. No. The range of a clinical thermometer is 35°C to 42°C, while the boiling
temperature is far more than 42°C.
22. Ans.
(i) A bike moving with a constant speed:
(ii) A car parked on the road side:
CBSE VII | SCIENCE
Sample Paper – 2 Solution
SECTION C
23. Ans.
(i) Amoeba:
(ii) Pseudopodia help amoeba in capturing of food and in movement. During feeding,
amoeba produces two pseudopodia which surround the food particle. The two
pseudopodia join and trap the food particle inside the body.
24. Ans.
(i) The trunk is helpful to elephants in the following ways:
1. It imparts a strong sense of smell to elephants.
2. It helps them to spray water on their back to keep them clean and cool.
3. Elephants breathe with the help of the trunk.
4. Elephants grasp their food and suck water with the help of their trunk.
(ii) Adaptations which help penguins to live in polar regions are as follows:
1. Penguins have thick skin and a layer of fat under the skin.
2. Penguins huddle together to make themselves warm.
25. Ans.
(i) Sand in deserts has a poor water-holding capacity. Because water is the most
essential component required for plant growth, few plantations are found in the
desert.
(ii) Clay has the smallest sized particles, i.e. less than 0.002 mm. Due to the small
particle size, intermolecular spaces are small. Hence, the soil is not aerated. Its
water-absorbing and water-retaining capacity is high; thus, it becomes
waterlogged. For the growth of plants, it is important that the soil is well aerated
and there is no water logging. Hence, clay soil is not suitable for plant growth.
Page 5
CBSE VII | SCIENCE
Sample Paper – 2 Solution
CBSE
Class VII Science
Term 1
Sample Paper – 2 Solution
Time: 2 ½ hrs Total Marks: 80
SECTION A
1. Ans. Correct Option: [B]
Solution: The pulp cavity contains nerves and blood vessels.
2. Ans. Correct Option: [A]
Solution: Respiration in earthworm takes place through the skin.
3. Ans. Correct Option: [A]
Solution: Summer monsoon winds are monsoon winds which bring rainfall over
India.
4. Ans. Correct Option: [C]
Solution: The layer of the B horizon is hard and compact. It is rich in minerals.
5. Ans. Correct Option: [D]
Solution: The silk moth cuts open the cocoon at the end of the pupal stage. During
the pupal stage, the caterpillar is enclosed in the hard shell of silk fibres called the
cocoon.
6. Ans. Correct Option: [C]
Solution: Llama and Alpaca yield wool in South America.
7. Ans. Correct Option: [A]
Solution: This picture shows scouring by machine. Scouring involves the thorough
washing of the sheared skin to remove grease, dust and dirt.
8. Ans. Correct Option: [C]
Solution: Lime water contains calcium hydroxide which is a base. Bases are bitter
in taste.
9. Ans. Correct Option: [C]
Solution: Soda water is basic in nature. Bases change the colour of China rose
indicator to green.
CBSE VII | SCIENCE
Sample Paper – 2 Solution
10. Ans. Correct Option: [B]
Solution: The air from the land towards the sea is called land breeze.
11. Ans. Correct Option: [A]
Solution: While reading a thermometer, we should not hold it by the bulb.
12. Ans. Correct Option: [B]
Solution: The bulb in the thermometer has mercury.
13. Ans. Correct Option: [C]
Solution: One of the most well-known periodic motions is that of a simple
pendulum.
14. Ans. Correct Option: [A]
Solution: Speed = Distance travelled/Time
Thus, in case of A, in the same amount of time, the distance travelled is more as
compared to that of B.
15. Ans. Correct Option: [B]
Solution: The speed is zero if the graph is a straight line parallel to the time axis.
SECTION B
16. Ans. Leguminous crops have root nodules which contain Rhizobium. Rhizobia
convert atmospheric nitrogen into nitrates. These nitrates mix with the soil and
enrich it. Thus, the soil gets enriched with nitrogen compounds.
17. Ans. The topsoil is rich in humus and minerals. It is the home for many living things
such as earthworms. It also contains decayed plant and animal remains. The
presence of minerals, living things and decaying plant and animal remains makes
the top soil fertile.
18. Ans. Yeasts are single-celled fungi. They respire anaerobically, i.e. they convert
glucose into alcohol in the absence of oxygen.
19. Ans.
1. Shearing is done only once in a year generally during the hot weather in
summer.
2. During shearing, the layer of hair along with a thin layer of skin which is dead is
removed. Hence, it does not hurt the sheep.
CBSE VII | SCIENCE
Sample Paper – 2 Solution
20. Ans.
Type of fibre Burning smell
Artificial silk Smell of burning paper
Natural silk Smell of burning hair
21. Ans. No. The range of a clinical thermometer is 35°C to 42°C, while the boiling
temperature is far more than 42°C.
22. Ans.
(i) A bike moving with a constant speed:
(ii) A car parked on the road side:
CBSE VII | SCIENCE
Sample Paper – 2 Solution
SECTION C
23. Ans.
(i) Amoeba:
(ii) Pseudopodia help amoeba in capturing of food and in movement. During feeding,
amoeba produces two pseudopodia which surround the food particle. The two
pseudopodia join and trap the food particle inside the body.
24. Ans.
(i) The trunk is helpful to elephants in the following ways:
1. It imparts a strong sense of smell to elephants.
2. It helps them to spray water on their back to keep them clean and cool.
3. Elephants breathe with the help of the trunk.
4. Elephants grasp their food and suck water with the help of their trunk.
(ii) Adaptations which help penguins to live in polar regions are as follows:
1. Penguins have thick skin and a layer of fat under the skin.
2. Penguins huddle together to make themselves warm.
25. Ans.
(i) Sand in deserts has a poor water-holding capacity. Because water is the most
essential component required for plant growth, few plantations are found in the
desert.
(ii) Clay has the smallest sized particles, i.e. less than 0.002 mm. Due to the small
particle size, intermolecular spaces are small. Hence, the soil is not aerated. Its
water-absorbing and water-retaining capacity is high; thus, it becomes
waterlogged. For the growth of plants, it is important that the soil is well aerated
and there is no water logging. Hence, clay soil is not suitable for plant growth.
CBSE VII | SCIENCE
Sample Paper – 2 Solution
26. Ans.
(i) A – Trachea
B – Diaphragm
(ii) During inhalation, we take about 21% oxygen and 0.04% carbon dioxide in our
lungs. During exhalation, 16.4% oxygen and 4.4% carbon dioxide is taken out of
the lungs.
27. Ans.
(i) An indicator is a dye which changes colour when it is put into an acid or a base.
(ii) Put one drop of each liquid on turmeric paper, turn by turn.
1. The liquid which turns the yellow turmeric paper red will be sodium
hydroxide (base). The red turmeric paper formed here can now be used to
test sulphuric acid.
2. Put one drop each of the remaining two liquids on red turmeric paper. The
liquid which makes the red turmeric paper yellow again will be sulphuric
acid. This is because sulphuric acid cancels the effect of the sodium
hydroxide base on turmeric paper.
3. The liquid which has no effect on the red-turned turmeric paper will be salt
solution because it is neutral.
28. Ans.
(i) A salt is a substance formed by the reaction of an acid with a base.
(ii) Salts can be of three types:
1. Neutral salts: Salts which form a neutral solution on dissolving in water are
called neutral salts. The salts formed by the neutralisation of a strong acid by
a strong base are neutral salts. Example: Sodium chloride (NaCl)
2. Acidic salts: Salts which form an acidic solution on dissolving in water are
called acidic salts. The salts formed by the neutralisation of a strong acid with
a weak base are acidic salts. Example: Ammonium chloride (NH 4Cl)
3. Basic salts: Salts which form basic solutions on dissolving in water are called
basic salts. The salts formed by the neutralisation of weak acids with strong
bases are basic salts. Example: Sodium carbonate (Na 2CO 3)
29. Ans.
(i) When one end of a wooden spoon is dipped in a cup of ice cream, there will be no
change in the temperature of its other end. Wood is a bad conductor of heat, so
there will be no flow of heat from one end to the other.
(ii) The material of a pan is a good conductor of heat. So, a handle of wood (which is
a bad conductor of heat) is used in a frying pan so that it does not get heated by
conduction.
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