DAV Class 7 Science Chapter 13 Weather, Climate and Adaptation of Animals Question Answer Notes
DAV Class 7 Science Chapter 13 Weather, Climate and Adaptation of Animals Question Answer Notes Solution by Expert Science Teacher. DAV Class 7 Science 13th Chapter Weather, Climate and Adaptation of Animals for Students of DAV Schools.
Lesson No 13
Weather, Climate and Adaptation of Animals
A.) Fill in the blanks.
Answer: (1) relative humidity (2) Rain, drizzle, snowfall, hail (3) Clouds (4) climate (5) arid (6) hollow bones
B.) Match the following:
1. Humidity | a. Prehensile tail |
2. Sub-tropical | b. Equator |
3. Tropical Rain Forest | c. Hot and wet summer |
4. Red- eyed Frog | d. Water vapour |
5. Monkey | E. Sucker pads |
Answer: (1) d, (2) c, (3) b, (4) e, (5) a
C.) Tick the correct option.
Answer:
(1) mountain
(2) polar regions
(3) hot and humid
(4) lion-tailed macaque
(5) the tassel at the end of its tail
D.) Answer the following questions in brief.
1.) List the main elements that determine the weather of a place.
Answer: Following elements determine the weather of a place: temperature, humidity, cloudiness, precipitation, wind and atmospheric pressure.
2.) When are the maximum and minimum temperatures likely to occur during the day?
Answer: During the day, maximum temperature is during mid-afternoon and the minimum temperature is during early morning.
3.) How can forecast, about a ‘clear sky, or an ‘approaching storm’ be made by measuring the atmospheric pressure of a given region?
Answer: Atmospheric pressure gives a good indication of oncoming weather. If atmospheric pressure is normal, it shows a calm day ahead. If atmospheric pressure is low, it indicates towards an oncoming storm.
4.) Name the major climatic zones of India. Also mention the names of two states each, that fall in these zones.
India is a vast country with a diverse geography and climate. The major climatic zones of India are:
- Tropical wet: Kerala, Andaman and Nicobar islands.
- Tropical dry: Rajasthan and Gujarat
- Subtropical humid: West Bengal and Maharashtra
- Temperate: Jammu and Kashmir and Himachal Pradesh
- Arctic: Ladakh
- Coastal: Goa and Odisha
5.) Mention two adaptive features of a penguin that help it in swimming.
Answer: A penguin can swim more especially due to its sleek body and paddle-shaped feet. Other than this penguins do not have hollow bones as a result it becomes easier for them to swim rather than flying.
6.) State the function of sucker pads on the feet of the red-eyed frogs.
Answer: Red-eyed frogs can climb trees with the aid of sucker pads on their feet, this is a special adaptive feature in them.
E.) Answer the following questions.
1.) Differentiate between:
(a.) Weather and climate
The notions of “weather” and “climate,” that are distinct yet connected, are used to describe the atmospheric conditions of a place. Weather is the short-term air temperature of a place, including temperatures, moisture, wind, including rainfall. The weather might change abruptly and dramatically from one day to the next, or even from hour to hour. The climate of a place is defined as its typical long-term weather patterns. The long-term averages of temperature, precipitation, moisture, and wind patterns are referred to as “climate.” Although it might change throughout time, the climate is generally stable and predictable.
(b.) Climate in polar regions and in tropical rain forests.
North and south poles like the Arctic and Antarctica have severe, icy environments. They stand out for having long, dark winters and short, dry summers. The ground has always been frozen and the temperature is typically considerably below zero in these places. These regions are also characterised by strong winds and snowstorms. Tropical rainforests, on the other hand, have substantial yearly precipitation and warm, muggy temperatures. Due of their proximity to the equator, they are subject to intense heat and sunlight. Temperatures of about 27 degrees Celsius are common in these places. Rainforests also have high relative humidity and frequent rain, which can range from moderate drizzle to heavy downpours.
2.) What is adaptation? Give one example each of behavioural and structural adaptations.
Answer: Adaptation is an ability of an animal which makes it suited to its environment. Some examples of adaptation are as follows:
Behavioural Adaptation: Moving in large groups is an example of behavioural adaptation. This helps in protecting the members of the group from predators.
Structural Adaptation: Polar bear has a thick coat of fur; which is an example of structural adaptation.
3.) Mention any four adaptations that have helped the polar bear to survive in the Polar Region.
The polar bear is well adapted to survive in the harsh polar environment. Some of the adaptations that have helped the polar bear survive in the Polar Region are:
- Thick fur and blubber.
- Large body size.
- Large paws.
- Ability to swim
4.) Give reasons.
(a.) Big cats have sharp teeth.
Answer: Big cats are carnivorous hence the sharp teeth help them in tearing the flesh of the animal they would consume.
(b.) Some monkeys have long prehensile tails.
Answer: This is an adaptive feature and monkeys utilise this tail to hang from branches and travel from one tree to another
(c.) Penguins do not have air spaces in their bones.
Answer: Penguin is a flightless bird and it either travels on foot or swims. To swim across ocean and seas the heavy bones help them.
5.) ‘The tropical rainforest has a large population of animals.’ Explain why it is so?
Answer: Tropical regions are rich in a variety of vegetation and also are home to thick rainforests that provide habitat and food to various species of animals.
6.) How is the trunk useful to the elephant?
The trunk of an elephant is a highly versatile and important body part that serves many functions. Some of the ways in which the trunk is useful to the elephant include:
The elephant’s incredible dexterity and sensitivity allow it to pick up and move small items with remarkable precision. Elephants can use their trunks to gather fruit, nuts, and branches from trees as well as grasp and carry food. They can also open jars and bottles.
Elephants communicate with one another by touching each other with their trunks and using a variety of vocalisations. The trunk also has the ability to locate other elephants by feeling the ground as well as the atmosphere.
The elephant uses its trunk, that also serves as a nose as well as top lip, to breathe and smell.
More Extra Questions for Preparation
Q.1.) Fill in the blanks.
1.) Humidity is a measure of the amount of water vapour in the atmosphere.
2.) A wind coming from the north, is known as a northern wind.
3.) Temperature is generally highest in the Tropics and lowest near the Poles.
4.) The word ‘climate’ comes from the Greek word ‘klima`.
5.) The body temperature, of polar bears, which is normally is 37°C.
6.) Toco Toucan has 20 cm long beak.
7.) Elephants can smell water at great distances.
8.) Meteorology is a study and forecasting of weather.
Q.2.) Match the following.
1.) Alpine zone | a.) Penguins |
2.) Arid zone | b.) helps to detect odours |
3.) Polar region | c.) Arctic ocean |
4.) Paddle like feet | d.) high altitude of Himalayas |
5.) Nostrils | e.) Rajasthan |
Answer – 1-d, 2- e, 3- c, 4- a, 5- b .
Q.3.) Choose the correct answer.
1.) Temperature on the earth averages at sea level.
a.) 20° C
b.) 15° C
c.) 45° C
d.) 17° C
Answer – b. 15° C
2.) The word ‘ ’ comes from the Greek word klima.
a.) Air
b.) Water
c.) Climate
d.) None of these
Answer – c. Climate
3.) zone is prevalent in most of the northern part of India.
a.) Sub tropical zone
b.) Arid zone
c.) Alpine zone
d.) Tropical zone
Answer – a. Sub tropical zone
4.) have snow throughout the year.
a.) Tropical zone
b.) Sub tropical zone
c.) Alpine zone
d.) Arid zone
Answer – c. Alpine zone
5.) High temperature and low rainfall
a.) Arid zone
b.) Alpine zone
c.) Tropical zone
d.) Sub tropical zone
Answer – a.) Arid zone
Q.4.) Define the following.
1.) Temperature.
Answer – Temperature is an indicator of the ‘degree of hotness or coldness’ of the air.
2.) Humidity.
Answer – Humidity is a measure of the amount of water vapour in the atmosphere.
3.) Wind.
Answer – The horizontal movement of air is referred to as the wind.
4.) Precipitation.
Answer – Precipitation is produced when the droplets and crystals in clouds grow large enough to fall on to the ground.
5.) Climate.
Answer – Climate is the average weather in a particular region over a long period of time.
Q.5.) Answer the following.
1.) What is atmospheric pressure?
Answer – Atmospheric pressure is the force, due to the weight of the air, on a given surface, divided by the area of that surface. Falling pressure usually indicates an approaching storm; rising pressure usually indicates clear skies.
2.) Explain adaptation by monkeys.
Answer –
a.) Monkeys also provide a good example of adaptation.
b.) Some monkeys have long prehensile tails for grasping branches.
c.) Their long arms, and legs, help them to swing from one branch to another; their fingers, and toes, act like hooks and help them to hold on to the branches.
3.) Explain cloudiness in brief.
Answer –
a.) Most clouds are produced due to the cooling of air as it rises up.
b.) When air temperature gets reduced, the excess water vapour, in the air, condenses into liquid droplets, or ice crystals, to form clouds or fog.
c.) Fog refers to clouds that almost touch the ground.
d.) In dense fog, the visibility range may be around 50 m or so.
4.) What is dry and cold climate?
Answer –
a.) A place, that usually does not get much rain over a year, would be said to have a dry climate.
b.) A place, where it usually stays cold for most of the year, would be said to have a cold climate.
5.) Explain adaptation and their types .
Answer -a.) Adaptation is a trait that makes an animal suited to its environment. It can be a behavioural, or a structural, trait.
b.) Moving in large groups is a behavioural adaptation. It helps protect the members of the group from predators.
c.) The thick fur coat of polar bear is a structural adaptation. It helps to protect it against the cold