{"id":63757,"date":"2019-04-19T16:49:45","date_gmt":"2019-04-19T11:19:45","guid":{"rendered":"https:\/\/www.learncbse.in\/?p=63757"},"modified":"2019-04-25T17:21:43","modified_gmt":"2019-04-25T11:51:43","slug":"ncert-exemplar-class-7-science-chapter-7","status":"publish","type":"post","link":"https:\/\/www.learncbse.in\/ncert-exemplar-class-7-science-chapter-7\/","title":{"rendered":"NCERT Exemplar Class 7 Science Chapter 7 Weather, Climate and Adaptations of Animals to Climate"},"content":{"rendered":"

NCERT Exemplar Class 7 Science Chapter 7 Weather, Climate and Adaptations of Animals to Climate of NCERT Exemplar Class 7 Science<\/a>. Here we have given NCERT Exemplar Class 7 Science Solutions Chapter 7 Weather, Climate and Adaptations of Animals to Climate<\/p>\n

NCERT Exemplar Class 7 Science Solutions Chapter 7 Weather, Climate and Adaptations of Animals to Climate<\/h2>\n

Multiple Choice Questions<\/strong><\/p>\n

Question 1.
\nThe maximum and minimum temperature displayed daily in the weather bulletin refer to the
\n(a) highest day temperature and lowest night temperature of the day.
\n(b) highest day temperature and highest night temperature of the month.
\n(c) temperature recorded at 12 noon and at midnight (00.00 hrs).
\n(d) average highest temperature of day and average lowest temperature of night.
\nSolution:
\nNone of the options is correct. The maximum temperature of the day occurs in the afternoon while the minimum temperature occurs at the time of dawn.<\/p>\n

Question 2.
\nOut of the given definitions, which is the most appropriate definition of climate?
\n(a) Changes in weather conditions in a year
\n(b) Average weather pattern of many years
\n(c) Change in weather pattern in a few years
\n(d) Weather conditions during summer
\nSolution:
\n(b)<\/p>\n

Question 3.
\nWhich of the following briefly describes the desert climate?
\n(a) Hot and humid
\n(b) Dry and humid
\n(c) Hot and dry
\n(d) Hot and wet
\nSolution:
\n(c)<\/p>\n

Question 4.
\nPaheli 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
\n(a) temperate region
\n(b) tropical region
\n(c) polar region
\n(d) coastal region.
\nSolution:
\n(b)<\/p>\n

Question 5.
\nGiven below are some adaptive features of animals.
\n(i) Layer of fat under the skin
\n(ii) Long, curved and sharp claws
\n(iii) Slippery body
\n(iv) Thick white fur
\nWhich of them are the adaptive features of a polar bear?
\n(a) (i) only
\n(b) (i) and (ii) only
\n(c) (i), (ii) and (iii) only
\n(d) (i), (ii) and (iv)
\nSolution:
\n(d) The body of polar bear is covered with thick white fur which helps the animal to camouflage with the snow. Thick layer of fat insulates the body from cold and long, curved and sharp claws provide good grip and help them to walk on ice.<\/p>\n

Question 6.
\nWhich of the following statements is incorrect for penguins? –
\n(a)They huddle together.
\n(b)They cannot swim.
\n(c)They have webbed feet.
\n(d)They have streamlined body.
\nSolution:
\n(b) Penguins are good swimmers. They have streamlined bodies and webbed feet that help them in swimming.<\/p>\n

Question 7.
\nRead the following environmental conditions of tropical rainforests.
\n(i) Hot and humid climate
\n(ii) Unequal lengths of day and night
\n(iii) Abundant rainfall
\n(iv) Abundant light and moisture
\nIdentify the conditions from the above list that are responsible for the presence of large number of plants and animals in tropical rain forests.
\n(a) (i)and(ii)
\n(b) (i) and (iii)
\n(c) (i), (iii) and (iv)
\n(d) (ii) and (iv)
\nSolution:
\n(c) The tropical regions generally have a hot and humid climate because of its location around the equator. These regions get plenty of rainfall. These climatic conditions are highly suitable for supporting an enormous number and variety of animals. In tropical rainforest areas days and night are almost equal in length throughout the year.<\/p>\n

Question 8.
\nThe coldest region on earth is the
\n(a) polar region
\n(b) tropical region
\n(c) temperate region
\n(d) coastal region.
\nSolution:
\n(a) Polar regions are very cold regions which are covered with snow. In winters the temperature can drop to as low as -37\u00b0C.<\/p>\n

Question 9.
\nChoose the odd one from the following options,
\n(a) Thick layer of fat under the skin
\n(b) White fur
\n(c) Long grasping tail
\n(d) Wide and large feet with sharp claws
\nSolution:
\n(c) Long grasping tail is the adaptive feature of animals living in tropical rain\u00acforest e.g., monkey, whereas thick layer of fat under the skin, white fur and wide and large feet with sharp claws are adaptive features of polar region animals e.g., polar bear. Thick layer of fat under the skin provides insulation against cold. White fur colour helps them to camouflage with the snow and wide and large feet with sharp claws help them to move on ice.<\/p>\n

Very Short Answer Type Questions<\/strong><\/p>\n

Question 10.
\n“A Fish dies when taken out of water whereas a wall lizard will die if kept under water.” Mention the term used to describe such abilities that allow fish and lizard to survive in their respective habitats.
\nSolution:
\nAdaptation is the term used to describe such abilities that allow fish and lizard to I survive in their respective habitats. Adaptation is the adjustment shown in the structure or functioning of an organism that make it better suited to its changed environment. Due to lack of certain adaptation a fish dies when taken out of water whereas a wall lizard will die if kept under water.<\/p>\n

Question 11.
\nGive one example of an animal that can live both in water and on land.
\nSolution:
\nFrog<\/p>\n

Question 12.
\nState whether the following statements are True or False. Correct the false statements.
\n(a) It is easy to predict weather rather than
\n(b) Since very few prey are available, polar bear does not need to have strong sense of smell.
\n(c) Penguins stick together to fight the cold polar climate.
\n(d) Tropical rainforests are cool and humid throughout the year because of heavy rains all the time.
\nSolution:
\n(a) False – It is easy to predict the climate rather than weather.
\n(b) False – Polar bear needs to have a strong sense of smell because in polar region very few prey are available so keen sense of smell helps them to catch the prey.
\n(c) True
\n(d) False – Tropical rainforests are hot and humid throughout the year because of heavy rains all the time.<\/p>\n

Question 13.
\nUnscramble the following words using the hints given against them.
\n(i) MATLICE (Hint: weather pattern in a region over a period of time)
\n(ii) AROPL (Hint: coolest region on earth)
\n(iii) TREHMEOMRET (Hint: used to measure temperature)
\n(iv) UHIDYTMI (Hint: feature of weather)
\nSolution:
\n(i) CLIMATE
\n(ii) POLAR
\n(iii) THERMOMETER
\n(iv) HUMIDITY<\/p>\n

Short Answer Type Questions<\/strong><\/p>\n

Question 14.
\nMatch the animals mentioned in column I with their characteristic features given in column II<\/p>\n\n\n\n\n\n\n\n
Column 1<\/td>\nColumn II<\/td>\n<\/tr>\n
(a)<\/td>\nRed-eyed frog<\/td>\n(i)<\/td>\nVery sensitive hearing<\/td>\n<\/tr>\n
(b)<\/td>\nPenguin<\/td>\n(ii)<\/td>\nStreamlined body<\/td>\n<\/tr>\n
(c)<\/td>\nTiger<\/td>\n(iii)<\/td>\nSilver-white mane<\/td>\n<\/tr>\n
(d)<\/td>\nLion-tailed macaque<\/td>\n(iv)<\/td>\nSticky pads on feet<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Solution:
\n(a) (iv)
\n(b) (ii)
\n(c)(i)
\n(d) (iii)<\/p>\n

Question 15.
\nWhy is it difficult to predict the weather of a place while it is easy to predict its climate?
\nSolution:
\nWeather is a very complex phenomenon as it is affected by number of factors and is not easy to predict. Climate is determined by limited factors like – distance from the equator (latitude), height above sea level, distance from the sea or from high mountain ranges, wind and amount of moisture in the air. Weather change from day to day and even from hour to hour. It may be sunny in the morning but suddenly may get overcast and start raining heavily in the afternoon whereas climate changes after years. Climate is average weather pattern taken over a long time say 25 years, thus climate is easier to predict.<\/p>\n

Question 16.
\nName two animals each that live in Polar region and Tropical rainforests.
\nSolution:
\nPolar regions – polar bear, penguin, reindeer, musk oxen etc. Tropical rainforests – red-eyed frog, elephants, lion-tailed macaque etc.<\/p>\n

Question 17.
\nWrite two common adaptive features of a polar bear which help in keeping it warm.
\nSolution:
\nCommon adaptive features of a polar bear which help in keeping it warm are:
\n(i) Two thick layer of fine fur covering the body, traps air (which is an insulator of heat) and keep it warm.
\n(ii) A layer of fat under the skin provide excellent insulation and keep it warm.<\/p>\n

Question 18.
\nMention two adaptive features of penguin that help it in swimming.
\nSolution:
\nTwo adaptive features of penguins that help it in swimming are as follows :
\n(i) streamlined body
\n(ii) webbed feet.<\/p>\n

Question 19.
\nDifferentiate between:
\n(i) Weather and climate
\n(ii) Humidity and rainfall
\n(iii) Climates of polar region and tropical rain forest
\n(iv) Maximum and minimum temperatures of the day
\nSolution:
\n(i)<\/p>\n\n\n\n\n\n
<\/td>\nWeather<\/strong><\/td>\nClimate<\/strong><\/td>\n<\/tr>\n
(a)<\/td>\nWeather is day- to-day conditions of the atmosphere at a place with regard to factors like temperature, humidity, rainfall, speed and direction of wind, etc.<\/td>\nClimate is the average weather pattern of a place taken over a long time, say 25 years or more.<\/td>\n<\/tr>\n
(b)<\/td>\nWeather changes from day to day and even from hour to hour.<\/td>\nClimate changes in a long period of time.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

(ii)<\/p>\n\n\n\n\n\n
<\/td>\nHumidity<\/strong><\/td>\nRainfall<\/strong><\/td>\n<\/tr>\n
(a)<\/td>\nHumidity indicates the wetness of a place due to amount of moisture in the atmosphere.<\/td>\nRainfall is the drops of water that fall from clouds on the ground.<\/td>\n<\/tr>\n
(b)<\/td>\nHumidity is measured by an instrument called hygrometer.<\/td>\nRainfall is measured by rain gauge.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

(iii)<\/p>\n\n\n\n\n\n
<\/td>\nPolar<\/strong><\/td>\nTropical Rain\u00adforest<\/strong><\/td>\n<\/tr>\n
(a)<\/td>\nPolar regions are very cold region.<\/td>\nTropical rainforests have a hot and wet climates.<\/td>\n<\/tr>\n
(b)<\/td>\nIn winters temperature can drop to as low as \u2018-37\u00b0C.<\/td>\nIn winters temperature is generally higher than 15\u00b0C.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

(iv)<\/p>\n\n\n\n\n\n
<\/td>\nMaximum temperature<\/strong><\/td>\nMinimum temperature<\/strong><\/td>\n<\/tr>\n
(a)<\/td>\nMaximum temperature indicates highest recorded temperature.<\/td>\nMinimum temperature indicates lowest recorded temperature.<\/td>\n<\/tr>\n
(b)<\/td>\nMaximum temperature of the day normally occurs in the afternoon as the earth gets heated by the sun.<\/td>\nMinimum temperature occurs early in the morning.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Long Answer Type Questions<\/strong><\/p>\n

Question 20.
\nFill in the blanks in the paragraph given below.
\nWeather of a place is the day to day condition of the ___(a)____ with respect to ___(b)____ , ___(c)____ , ___(d)____,\u00a0 ___(e)_____JeL at that place, while climate is the ___(f)____weather pattern taken over many years
\nSolution:
\n(a) atmosphere
\n(b) temperature
\n(c) humidity
\n(d) rainfall
\n(e) windspeed
\n(f) average<\/p>\n

Question 21.
\nGiven 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.
\nPenguin, 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\u00b0C, Western Ghats.<\/p>\n\n\n\n\n\n\n\n
Tropical rainforest<\/strong><\/td>\nPolar region<\/strong><\/td>\n<\/tr>\n
\u2022 Hot and humid climate<\/td>\n\u2022 Penguin<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Solution:<\/p>\n\n\n\n\n\n\n\n\n\n
Tropical rainforest<\/strong><\/td>\nPolar region<\/strong><\/td>\n<\/tr>\n
Hot and humid climate<\/td>\nPenguin<\/td>\n<\/tr>\n
Gorilla<\/td>\nReindeer<\/td>\n<\/tr>\n
Monkey<\/td>\nGreenland<\/td>\n<\/tr>\n
Assam<\/td>\nSun does not rise for six months<\/td>\n<\/tr>\n
Day and night are almost equal in length throughout the year<\/td>\nWinter temperature around -37\u00b0C<\/td>\n<\/tr>\n
Western Ghats<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

NCERT Exemplar Class 7 Science Solutions<\/h2>\n