Class 7 Science Chapter 7 MCQ

The highest temperature reached during the day is called the “maximum temperature” and the “lowest temperature” during the night is called the “minimum” temperature. These temperatures are recorded to prepare weather reports, by using a special thermometer called “maximum and minimum thermometer”.

The average weather pattern taken over a long time (say 25 years) is called the climate of that place. Temperature, rainfall, altitude and location with respect to the sea are factors which affect climate.

In the desert, the temperature of climate is high during most part of the year and receives very little rainfall. This is called the hot and dry climate, e.g. western region of India such as Rajasthan.

Since Nancy saw a large variety of plants and animals, the likely location could be tropical region. The highly favourable climatic conditions (continuous warmth and rain) of these regions supports a wide variety of living organisms.

Polar bear is a large white bear that lives in North polar regions of the Earth. For living in extremely cold climate, it has many adaptations, such as: i)Layer of fat under skin for insulation. ii)Long curved and sharp claws to walk and run on slippery ice. iii)Thick white fur. White colours protect it from predators and thick layer keep it warm. iv)Other features are rounded body, small ears and strong sense of smell.

Penguins have streamlined body, flippers like wings and webbed feet which make them good swimmers. This helps in catching their prey (fish).

The environmental conditions in tropical rainforests are highly suitable for supporting an enormous number and a variety of plants and animals. The conditions are: i)Hot and humid climate because of its location around equator ii)Abundant rainfall, light and moisture.

The minimum temperature of the day generally occurs in the early morning or dawn not dusk.

The polar regions of the earth have an extreme cold climate. These regions are covered with snow and very cold for most part of the year. The options i.e. tropical region, has a hot climate, temperate regions do not have extremes of temperature and precipitation and coastal region has mild climate, with hot summers and cool winters.

During summer, sunrise is early and the sunset is late. Due to this, days are longer in summer and nights are shorter. On the other hand, during winter the sunrise is late but the sunset is early. Due to this, days are shorter in winter but nights are longer.

Here, all the statements are correct. Hence, your answer will be option [D].

Here, all the statements are correct. Hence, your answer will be option [D].

Our climate depends on our position on the earth and our distance from the Sun.

Here, all the statements are correct. Hence, your answer will be option [D].

Climate has a great effect on all the living organisms (animal as well as plants). A living organism can survive in a particular habitat only if its body is suited or adapted to the climate of that habitat. Animals and plants develop special features in their body or develop certain habits to survive in their habitats or surroundings.

Countries that belong to the polar regions are Canada, Greenland (Denmark), Iceland Norway, Sweden, Finland, Alaska in USA and Siberian region of Russia. All these countries actually belong to the north polar regions which is also called Arctic region.

Here, all the statements are correct. Hence, your answer will be option [D].

The two animals which live in polar regions are polar bears and penguins. Polar bears live in north pole region whereas penguins live in the south pole regions of the earth the polar regions have adapted to live in the severely cold climate by taking the examples of polar bear and penguins.

In India tropical rain forests are found in Western Ghats and Assam. Western Ghat is a mountain range parallel to the West coast of India. Western Ghats run through Maharashtra, Karnataka, Tamil Nadu and Kerala states.

Here, all the statements are correct. Hence, your answer will be option [D].

The elephant has large ears. The large ears of elephant help it to hear even very soft sound. Due to large ears, an elephant can hear even the slightest sound made by its predator behind him so that it can sense the danger and run away to safety. When the temperature rises, the elephants flap their large ears and use them as fans to cool themselves. So, the large ears also help the elephant to keep cool in the hot and humid climate of the tropical rainforest.

Red eyed frog is an carnivore and eats any type of insects as food.

Toucan is a fruit eating bird with a long and large beak. The long and large beak helps a toucan to reach the fruits attached to the ends of even thin branches of trees which are too weak to support its weight.

Here, all the statements are correct. Hence, your answer will be option [D].

The lion tailed macaque is a good climber and spends most of its time high up in trees. The hand and feet of lion-tailed macaque are adapted to hold on to the branches of trees firmly.