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question_answer1)
A land breeze blows when the air above land is ______and the air above sea is _________.
A)
Colder, Warmer done
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B)
Warmer, Lighter done
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C)
Heavier, Colder done
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D)
Warmer, Colder done
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question_answer2)
The process of water cycle that recharges water table and sometimes leads to floods; is also responsible for ________
A)
Drying of clothes done
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B)
Water loss from plant leaves done
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C)
Filling of wells done
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D)
Formation of dew drops done
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question_answer3)
Unscramble the given options and select the one that gives a cause for soil erosion.
A)
BANEEMKMNT done
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B)
RRTEAFARCEMING done
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C)
FFORTAESTAION done
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D)
AVERONGRZIG done
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question_answer4)
Select the option that arranges the major gases w. air in air in descending order of their percentage.
A)
Oxygen < Nitrogen < Carbon dioxide done
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B)
Nitrogen < Oxygen < Carbon dioxide done
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C)
Nitrogen > Oxygen > Carbon dioxide done
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D)
Carbon dioxide > Nitrogen > Oxygen done
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question_answer5)
The given activity shows that ________.
A)
Air consumes space done
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B)
Air rises up on getting warm done
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C)
Air is needed for burning done
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D)
Air has pressure done
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question_answer6)
Select the INCORRECT statement from the following.
A)
The dark colored humus found in deep layers of soil, makes soil fertile. done
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B)
Afforestation protects the soil from erosion. done
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C)
Organic manures are less harmful than chemical fertilizers. done
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D)
Overgrazing is one of the causes of soil erosion. done
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question_answer7)
____________ leads to pollution of water.
A)
Disposing hospital wastes on barren land without proper treatment done
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B)
Reducing the use of fossil fuels done
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C)
Carbon dioxide released in respiration by animals done
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D)
Throwing untreated industrial waste in water bodies done
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question_answer8)
Examine the experiment as shown in the given figure. 400 mL of water in flask P is heated until it is completely evaporated. The amount of water collected in flask Q will be about ___.
A)
200 mL done
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B)
350 mL done
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C)
300 mL done
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D)
400 mL done
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question_answer9)
Match the column I with column II and select the correct option.
Column I | Column II |
| (Causes of soil erosion) | | (Methods of soil conservation) |
a. | Running water carries the topsoil with it | 1. | Embankments |
b. | Strong winds blow away humus-rich topsoil | 2. | Wind breaks |
c. | Indiscriminate cutting of trees | 3. | Afforestation |
| | 4. | Terrace farming |
A)
a-1, 3; b-2; c-4 done
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B)
a-2, 4; b-1; c-3 done
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C)
a-2; b-1, 3; c-4 done
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D)
a-1, 4; b-2; c-3 done
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question_answer10)
Which of the following is the best method of purification of muddy water?
A)
B)
C)
D)
None of these done
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question_answer11)
Amit continued to heat 100 mL of pure water for 15 minutes after It reached boiling point. Which of the following figures shows the result at the end of his experiment?
A)
B)
C)
D)
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question_answer12)
Whenever we use the air conditioner, refrigerator, TV., etc., we send X gases into the air. Which of these is also an X gas?
A)
CNG done
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B)
Carbon dioxide done
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C)
Oxygen done
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D)
Nitrogen done
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question_answer13)
Which of the following will NOT cause water pollution?
A)
Releasing harmful gases into the air done
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B)
Using recycled waste water for cleaning done
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C)
Putting unwanted waste in abandoned fields located nearby a water body done
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D)
Throwing industrial and chemical waste products into rivers done
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question_answer14)
A scientist observed a sudden increase in the number of algae in a lake eves a few days. The reason behind it could be that ________.
A)
Water cycle in the area got unbalanced done
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B)
Electronic wastes were being dumped in a nearby area done
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C)
A factory with heavy smoke discharge has been established nearby done
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D)
Heavy amount of chemical fertilizers were being used in a nearby field done
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question_answer15)
The change in the number of water plants in four ponds, P, Q, R and S, over four months is shown in the graph. Which pond is the most polluted?
A)
P done
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B)
Q done
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C)
R done
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D)
S done
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question_answer16)
A factory was set up in an area which used to discharge its untreated waste down the pipe into nearby water body. After few years the factory was shut down due to some legal action. The given graph shows the changes in the populations of two organisms X and Y over time, before the setting of factory and after it was shut down. Identify X and Y and select the correct option.
A)
X could be bacteria and Y could be fish. done
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B)
X could be prawn and Y and could be a submerged aquatic plant. done
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C)
X could be a water bird and Y could be algae. done
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D)
X could be algae and Y could be bacteria. done
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question_answer17)
Which one of the following set-ups does not show that air occupies space?
A)
B)
C)
D)
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question_answer18)
DIRECTION: Refer to the given paragraph and table and answer the following question.
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Neha took 100 gm each of three types of soil, X, Y and Z, in three separate pots with hole at the bottom. The amount of water that was poured in the soil pot, just before it started dripping from the bottom hole, is tabulated here.
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The soil most suitable for pottery is _______.
A)
X done
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B)
Y done
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C)
Z done
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D)
Cannot be determined done
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question_answer19)
DIRECTION: Refer to the given paragraph and table and answer the following question.
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Neha took 100 gm each of three types of soil, X, Y and Z, in three separate pots with hole at the bottom. The amount of water that was poured in the soil pot, just before it started dripping from the bottom hole, is tabulated here.
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The soil suitable for growing watermelons and cactus is ______.
A)
X done
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B)
Y done
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C)
Z done
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D)
Cannot be determined done
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question_answer20)
DIRECTION: Refer to the given paragraph and table and answer the following question.
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Neha took 100 gm each of three types of soil, X, Y and Z, in three separate pots with hole at the bottom. The amount of water that was poured in the soil pot, just before it started dripping from the bottom hole, is tabulated here.
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The soil that is mixture of clay, sand, humus and is usually very good for growth of most plants is _______.
A)
X done
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B)
Y done
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C)
Z done
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D)
Cannot be determined done
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