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Practice MCQ Questions for Class 7 Science

1. Which among the following is generally not predicted in a daily weather report?

(a) Temperature
(b) Pressure
(c) Humidity
(d) Rainfall

2. Weather changes

(a) week after week
(b) day after day
(c) within a short period
(d) in any of the above time period

3. Rainfall is measured by

(a) rain gauge
(b) water level increase in ponds
(c) water level increase in water table
(d) none of these

4. Which of the following statement is incorrect for penguins?

(a) They huddle together
(b) They cannot swim
(c) They have webbed feet
(d) They have streamlined body

5. Choose the odd one from the following options:

(a) Thick layer of fat under the skin
(b) White fur
(c) Long grasping tail
(d) Wide and large feet with sharp claws

6. Which of the following is not an adaptive feature in polar bear?

(a) White fur
(b) Strong sense of smell
(c) Long curved and sharp claws
(d) Long tail

7. Which is the characteristic feature of tropical rainforests?

(a) Hot and humid climate
(b) Enormous number and variety of animals
(c) Competition for food and shelter
(d) All of these

8. Which of the following is the climate found in Kerala?

(a) Very hot and wet
(b) Wet
(c) Hot and dry
(d) Moderately hot and moderately dry

9. An organism’s body is streamlined, the habitat of organism should be

(a) Mountain
(b) Water
(c) Land
(d) Desert

10. The sun rises late and sets early during:

(a) summer season
(b) winter season
(c) rainy season
(d) all of these

11.The source of weather in first place is:

(a) due to sun
(b) due to moon
(c) due to rain
(d) all of these

12. Nights in deserts are much cooler because

(a) humidity becomes high
(b) sand cools down faster
(c) wind blows vigorously
(d) it rains at night

13. Fish uses which organ to breath in water?

(a) Skin
(b) Mouth
(c) Lungs
(d) Gills

14. The annual record of long-term average temperature and rainfall at a particular place is known as

(a) climate
(b) climate chart
(c) weather
(d) weather fore casting

15. Which of the following organism is the slowest mover?

(a) Rabbit
(b) Snake
(c) Monkey
(d) sloth

16. To reduce loss of water in desert areas the leaves of cactus are modified into _.

(a) branches
(b) Adventitious roots above the ground
(c) spines
(d) rounded shaped leaves

17. The coldest region on earth is the:

(a) polar region
(b) tropical region
(c) temperate region
(d) coastal region

18. The weather reports are prepared by the:

(a) meteorological department
(b) thermometer
(c) both (a) and (b)
(d) none of these

19. A long winter sleep of animals is called

(a) Cold sleep
(b) Aestivation
(c) Hibernation
(d) Deep sleep

20. The use of any combination of materials, coloration for riding of an animals is called

(a) Camouflage adaptation
(b) Behavioral adaptation
(c) Physiological adaptation
(d) Structural adaptation

Answer

1. Answer: (b) Pressure

Explanation: Pressure is not the part  of daily weather report. Pressure of air can not be written because there should be sudden rise in pressure.

2. Answer: (d) in any of the above time period

Explanation:change within a short period of time, week after week, day after day.

3. Answer: (a) rain gauge

Explanation: The standard instrument for the measurement of rainfall is the 203mm (8 inch) rain gauge. This is essentially a circular funnel with a diameter of 203mm which collects the rain into a graduated and calibrated cylinder. The measuring cylinder can record up to 25mm of precipitation.

4. Answer: (b) They cannot swim

Explanation: Penguins are white and blend in well with their surroundings. To shield itself from the cold, it has a thick skin and a lot of fat. Penguins huddled close together in order to stay warm.

5. Answer: (c) Long grasping tail

Explanation: All the given options except 'Long grasping tail' are an adaption of polar region animals. The adaption 'Long grasping tail' is fund in tropical region animals.

6. Answer: (d) Long tail

Explanation: Long tail is not an adaptive feature in polar bear. Polar bears can grow up to 3 meters in length. Polar bears do have tails, and like both the black bear and the brown bear, the tail is short. 

7. Answer: (d) All of these

Explanation:Tropical forest has a hot and humid climate, an enormous number and variety of species, and competition for food and agriculture.

8. Answer: (a) Very hot and wet

Explanation: Kerala's climate is very hot and wet as it lies in the tropical region.

9. Answer: (b) Water

Explanation: Aquatic animals have streamlined and slipper body as it gets easier for them to swim through the water currents without damaging their bodies.

10. Answer: (b) winter season

Explanation: In winter, the Northern Hemisphere points away from the sun, resulting in fewer hours of sunshine and shorter days. 

11. Answer: (a) due to sun

Explanation:The sun is a huge sphere of hot gases at a very high temperature. The distance of the sun from us is very large.

12. Answer: (b) sand cools down faster

Explanation: Nights are cooler in the deserts than in the plains because Sand radiates heat more quickly than the earth. Because deserts have such little water vapor in the air, it makes it harder to trap heat or cold in a desert.

13. Answer: (d) Gills

Explanation: Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills that are protected under gill covers (operculum) on both sides of the pharynx (throat).

14. Answer: (b) climate char

Explanation: Climate is the weather pattern of a particular place over a long period. It depends on the long-term patterns in a place like rainfall, temperature, humidity, wind, etc. A climate chart is the annual record of the long-term average temperature and rainfall at a particular place.

15. Answer: (d) sloth

Explanation: The sloth is the slowest mammal on earth. Land tortoises move at a speed of less than one mile per hour. It would take a snail 5 days and 12 hours to move a mile.

16. Answer: (c) spines

Explanation: The plants which grow and survive in the desert conditions have certain modified adaptations. The cactus plants grow in the desert area. In order to prevent the loss of water in these arid conditions, the leaves of the plants have been modified into sharp pointed thin structures known as spines. These spines reduce the surface area for preventing loss of water. 

17. Answer: (a) polar region

Explanation:Polar region is the coldest region on the earth.

18. Answer: (a) meteorological department

Explanation: It is the principal agency responsible for meteorological observations, weather forecasting and seismology.

19. Answer: (c) Hibernation

Explanation: Hibernation is a state of minimal activity and metabolic depression. Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metabolic rate.

20. Answer: (b) Behavioral adaptation

Explanation: Behavioral adaptations are the things organisms do to survive. For example, bird calls and migration are behavioral adaptations.

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