NCERT Exemplar Solutions Class 7 Science Weather Climate Adaptation of Animals to Climate

 

Multiple Choice Questions

Question 1:  The maximum and minimum temperature displayed daily in the weather bulletin refer to the –

(a) highest day temperature and lowest night temperature of the day.

(b) highest day temperature and highest night temperature of the month.

(c) the temperature recorded at 12 noon and at midnight (00.00 hrs).

(d) the average highest temperature of the day and the average lowest temperature of night. 

Solution 1:  (a) highest day temperature and lowest night temperature of the day. 

The peak temperature of the day takes place in the afternoon and the lowest temperature of the day takes place at dawn.

 

Question 2:  Out of the given definitions, which is the most appropriate definition of climate?

(a) Changes in weather conditions in a year.

(b) The average weather pattern for many years.

(c) Change in the weather pattern in a few years.

(d) Weather conditions during summer. 

Solution 2:  (b) Average weather pattern of many years. 

The atmosphere is the atmospheric patterns in a region that have been dominant for a long time.

 

Question 3:  Which of the following briefly describes the desert climate?

(a) Hot and humid

(b) Dry and humid

(c) Hot and dry

(d) Hot and wet 

Solution 3:  (c) Hot and dry

For most parts of the year, the temperature in the desert is high and the desert gets very little moisture, so the atmosphere in the desert can be hot and dry.

 

Question 4:  Paheli went to a wildlife sanctuary where she saw dense vegetation of trees, shrubs, herbs and also a variety of animals like monkeys, birds, elephants, snakes, frogs, etc. The most likely location of this sanctuary is in the –

(a) temperate region

(b) tropical region

(c) polar region

(d) coastal region 

Solution 4:  (b) tropical region 

Paheli's wildlife sanctuary was a tropical area and this region has a suitable location to sustain a large range of living species. As a tropical region, remaining alternatives such as temperate, polar, and marine regions would not foster a diversity of wildlife.

  

Question 5:  Given below are some adaptive features of animals:

(i) A layer of fat under the skin

(ii) Long, curved and sharp claws

(iii) Slippery body

(iv) Thick white fur

Which of them are the adaptive features of a polar bear?

(a) (i) only

(b) (i) and (ii) only

(c) (i), (ii) and (iii) only

(d) (i), (ii), and (iv) only 

Solution 5:  Answer is (d) (i), (ii), and (iv) only

To live in an extremely cold climate, the polar bear has many adaptations, such as:

(a) Thick layers of fat and fur - for insulation against the cold.

(b) Long, sharp, curved claws for walking and running on slippery ice.

(c) White fuzzy hair. The white colour covers it from predators and keeps it warm with a dense coating.

 

Question 6:  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 

Solution 6:  (b) They cannot swim 

The Penguin is white and the white backdrop matches well. To shield it from the cold, it has thick skin and lots of fat. Huddled together, penguins do things to keep themselves safe. Penguins, like polar bears, are strong swimmers as well. Their limbs are sleek and they have webbing on their ankles, making them strong swimmers.

 

Question 7:  Read the following environmental conditions of tropical rain forests.

(i) A hot and humid climate

(ii) Unequal lengths of day and night

(iii) Abundant rainfall

(iv) Abundant light and moisture

Identify the conditions from the above list that are responsible for the presence of large number of plants and animals in tropical rain forests.

(a) (i) and (ii)

(b) (i) and (iii)

(c) (i), (iii) and (iv)

(d) (ii) and (iv) 

Solution 7:  (c) (i), (iii) and (iv) 

Owing to its position near the equator, the tropical zone usually has a hot climate. The temperature is usually higher than around 15°C even in the coldest month. The temperature can reach 40°C during hot summers. Throughout the year, days and nights are about equal in time. These areas get plenty of precipitation. Tropical rain forests support a significant number of plants and animals for these reasons.

 

Question 8:  The coldest region on earth is the –

(a) polar region

(b) tropical region

(c) temperate region

(d) coastal region 

Solution 8: (a) polar region

The polar regions are covered in snow, and for much of the year, it is very cold. The sun does not fall on the poles for six months, although the sun does not rise on the other six months. The temperature can be as low as-37 ° C in the winter.

 

Question 9:  Choose the odd one from the following options:

(a) A thick layer of fat under the skin

(b) White fur

(c) Long grasping tail

(d) Wide and large feet with sharp claws 

Solution 9:  (c) Long grasping tail

The adaptation seen in animals from the tropical region is the long grasping tail, although other possibilities include adaptations to animals from the polar region.
 

Very Short Answer Questions :----->


Question 10:  “A fish dies when taken out of water whereas a wall lizard will die if kept underwater.” Mention the term used to describe such abilities that allow fish and lizard to survive in their respective habitats.

Solution 10:    Adaptation: Adaptation is the physical or behavioural characteristic of an organism that helps an organism to survive better in the surrounding environment.

 

Question 11:   Give one example of an animal that can live both in water and on land. 

Solution 11:    Frog is a kind of animal who can live both in water and on land.

 

Question 12:  State whether the following statements are True or False. Correct the false statements.

(a) It is easy to predict the weather rather than climate.

(b) Since very few preys are available, the polar bear does not need to have a strong sense of smell.

(c) Penguins stick together to fight the cold polar climate.

(d) Tropical rain forests are cool and humid throughout the year because of heavy rains all the time. 

Solution 12:

a) False- The atmosphere rather than the weather can easily be expected.

b) False- The polar bear must have a good sense of scent.

c) True

d) False- Throughout the year, tropical rain forests are hot and humid since they are situated close to the equator.

 

Question 13:  Unscramble the following words using the hints given against them.

  1. MATLICE (Hint: weather pattern in a region over a period of time)
  2. AROPL (Hint: coolest region on earth)
  3. TREHMEOMRET (Hint: used to measure temperature)
  4. UHIDYTMI (Hint: feature of weather) 

Solution 13:

1.  Climate

2.  Polar

3.  Thermometer

4.  Humidity

 

Short Answer Questions :------>


Question 14:  Match the animals mentioned in Column I with their characteristic features given in Column II.

NCERT Exemplar Solutions Class 7 Science Weather Climate Adaptation of Animals to Climate

Solution 14:

NCERT Exemplar Solutions Class 7 Science Weather Climate Adaptation of Animals to Climate-

 

Question 15:  Why is it difficult to predict the weather of a place while it is easy to predict its climate? 

Solution 15:   Since the atmosphere will change over a short period of time, whilst the climate is the average weather trend over a long period of time.

 

Question 16:  Name two animals each that live in Polar region and Tropical rain forests. 

Solution 16:

Polar region- Polar bear and Snowy owl.

Tropical rain forests- Lion and Tiger.

 

Question 17:  Write two common adaptive features of a polar bear which help in keeping it warm. 

Solution 17:

(a) Thick layers of fat and fur - for insulation against the cold.

(b) Long, sharp, curved claws for walking and running on slippery ice.

 

Question 18:  Mention two adaptive features of penguin that help it in swimming. 

Solution 18:   Their limbs are sleek and they have webbing on their ankles, making them strong swimmers.

 

Question 19:  Differentiate between:

(i) Weather and climate

(ii) Humidity and rainfall

(iii) Climates of the polar region and tropical rain forest

(iv) Maximum and minimum temperatures of the day 

Solution 19:

(i) Weather reflects short-term conditions of the atmosphere and daily fluctuation in temperature and humidity whereas the average weather pattern of a location is the Climate. 

(ii) Humidity is the concentration of water vapour present in the air whereas Rain is liquid water in the form of droplets that have condensed from atmospheric water vapour and then become heavy enough to fall under gravity. 

(iii) For the bulk of the year, climate of polar area is very cold whereas the climate of tropical rainforest is hot and humid throughout the year. 

(iv) Maximum temperature of the day occurs during the afternoon and minimum temperature of the day occurs in the night. 

 

Long Answer Questions :------>


Question 20:  Fill in the blanks in the paragraph given below.

Weather of a place is the day to day condition of the ___(a)____ with respect to ___(b)____ , ___(c)____ , ___(d)____,  ___(e)_____ at that place, while climate is the ___(f)____weather pattern taken over many years. 

Solution 20:  Weather of a place is the day to day condition of the (a) atmosphere with respect to (b) temperature, (c) humidity(d) rainfall, (e) wind speed at that place, while climate is the (f) average weather pattern has taken over many years.

 

Question 21: Given below is a list of climatic conditions and some examples of animals. Read them carefully and place the items in the relevant columns as shown.

 NCERT Exemplar Solutions Class 7 Science Weather Climate Adaptation of Animals to Climate-1

Penguin, Gorilla, Monkey, Reindeer, Assam, Greenland, Sun does not rise for six months, Hot and humid climate, Days and nights are almost equal in length throughout the year, Winter temperature around –37°C, Western Ghats

Solution 21:

NCERT Exemplar Solutions Class 7 Science Weather Climate Adaptation of Animals to Climate-2