1.
The Moon does not have the conditions favourable for Life as it has neither water nor air. It only has mountains, plains and depressions on its surface.
2.
Biosphere
3.
The Arctic Ocean is located within the Arctic Circle and surrounds the North Pole. It is connected with the Pacific Ocean by a narrow stretch of shallow water known as Berring strait. It is bound by northern coasts
of North America and Eurasia.
4.
The organisms in the biosphere is broadly divided into the plant kingdom and the animal kingdom.
5.
Apart from the Stars, Planets and Satellites, there are numerous tiny bodies which also move around the Sun. These bodies are called Asteroids. They are found between the orbits of Mars and Jupiter.
6.
Because the bright light of the Sun doesn't allow us to see these Objects of the Sky.
7.
a) Tropical Rain Forests occur in the areas which receive heavy rainfall.
b) They are so dense that sunlight doesn’t reach the ground.
c) Many species of trees are found in these forests, which shed their leaves at different times of the year. Therefore, they always appear green and are called an evergreen forest.
d) Important trees found in these forests are mahogany, ebony and rosewood.
e) Andaman and Nicobar Islands, parts of North-Eastern states and a narrow strip of the Western slope of the Western Ghats are the home of these forests.
8.
The organisms in the biosphere is broadly divided into the plant kingdom and the animal kingdom.
9.
Option A
10.
The continent lies in the Eastern Hemisphere. The Tropic of Cancer
passes through this continent. Asia is separated from Europe by the Ural mountains on the west
11.
Most of the plains are formed by rivers and their tributaries. The rivers flow down the slopes of mountains and erode them. They carry forward the eroded material. Then they deposit their load consisting of stones, sand and silt along their courses and in their valleys. It is from these deposits that plains are formed.
12.
Areas lying between the Arctic circle and the North Pole in the Northern Hemisphere and the Antarctic Circle and the South Pole in the Southern Hemisphere, are very cold. It is because the Sun here does not rise much above the Horizon. Therefore, its rays are always slanting and provide less heat. These are, therefore, called Frigid zones.
13.
The continent lies completely in the Northern and Western
Hemisphere.
14.
The earth is surrounded by a layer of gas called the atmosphere. This thin blanket of air is an integral and important aspect of the planet. It provides us with the air we breathe and protects us from the harmful
effects of sun’s rays.
15.
Emission from industries, thermal power plants and vehicles, pollute the air. Carbon dioxide (CO2) is an important constituent of air. But increase in the amount of CO2 leads to increase in global temperatures.
This is termed as global warming.
16.
Mauna Kea (Hawaii) in the Pacific Ocean is an undersea mountain. It is higher than Mount Everest being 10,205 metres high.
17.
The solid portion of the Earth on which we live is called Lithosphere.
18.
North America is the third largest continent of the
world.
19.
Option A
20.
Option D
