A. Tick (✓) the correct options to complete the sentences.
1. _____ is called the 'Blue Planet'.
(a) Uranus (b) Earth (c) Venus
2. The percentage of water on the Earth is _____ in comparison to the land area.
(a) 1% (b) 71% (c) 99%
3. The layer of air that surrounds the Earth is called _____
(a) atmosphere (b) ionosphere (c) hydrosphere
4. The Earth takes _____ to complete one revolution.
(a) 24 hours (b) 28 days (c) 365 days
5. _____ proved that the Earth is round in shape.
(a) Aryabhatta (b) Ferdinand Magellan (c) Aristotle (d) Columbus
B. Fill in the blanks.
1. The Earth is surrounded by a _____ of air.
2. The Earth is farthest from the sun in the month of _____
3. The Earth rotates on its _____ once in 24 hours.
4. Rivers and seas are small.
5. A large landmass is called a _____
C. Write (T) for true statements and (F) for false statements.
1. The layer of air surrounding the Earth is called revolution.
2. The Earth is the only planet that has life.
3. Nearly 30% of the Earth is covered with land.
4. The Earth moves around the Moon.
5. The surface of the Earth is even.
Answer (2)
The correct answers are: 1(b), 2(b), 3(a), 4(c), 5(b) for part A; fill in the blanks: 'layer', 'July', 'axis', 'bodies of water', 'continent' for part B; for part C, 1(F), 2(T), 3(T), 4(F), 5(F).
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Let's explore the questions step-by-step:
A. Tick (✓) the correct options to complete the sentences.
Earth is called the 'Blue Planet'. This is because Earth's surface is covered by about 71% water, making it appear blue from space.
The percentage of water on the Earth is 71% in comparison to the land area. Water bodies cover a significant portion of Earth's surface, while land makes up the remaining 29%.
The layer of air that surrounds the Earth is called the atmosphere . The atmosphere is a mixture of gases that envelops Earth, providing oxygen for living organisms and protecting the planet from harmful solar radiation.
The Earth takes 365 days to complete one revolution around the Sun. This movement is responsible for the changing seasons.
Ferdinand Magellan proved that the Earth is round in shape by organizing the first expedition that successfully circumnavigated the globe in the early 16th century.
B. Fill in the blanks.
The Earth is surrounded by a layer of air.
The Earth is farthest from the sun in the month of July . This point is called aphelion.
The Earth rotates on its axis once in 24 hours, creating day and night.
Correction needed: Rivers and seas are not small. They are large bodies of water. Alternatively, small water bodies can be streams and ponds.
A large landmass is called a continent .
C. Write (T) for true statements and (F) for false statements.
F - The layer of air surrounding the Earth is called the atmosphere, not revolution.
T - The Earth is currently the only known planet that has life.
T - Nearly 30% of the Earth is covered with land.
F - The Earth moves around the Sun, not the Moon. The Moon orbits the Earth.
F - The surface of the Earth is not even; it includes varied landscapes like mountains, valleys, plains, and plateaus.
