Class 3 Science Chapter 2 The Earth’s Neighbours Question Answer Key
Find complete Class 3 Science Chapter 2 ‘The Earth’s Neighbours’ textbook question answers, MCQs, True/False, fill in the blanks, short/long questions, and HOTS solutions.
UNDERSTANDING THE TEXT – EXERCISE SOLUTIONS
- Tick (✓) the right answer:
(a) Which is the only natural satellite of the Earth?
Options: (i) Jupiter (ii) Moon (iii) Venus (iv) Mars
Answer: (ii) Moon
(b) Which of the following is called a dwarf planet?
Options: (i) Mercury (ii) Mars (iii) Pluto (iv) Neptune
Answer: (iii) Pluto
(c) How many planets are there in the solar system?
Options: (i) Seven (ii) Eight (iii) Nine (iv) Six
Answer: (ii) Eight
(d) Which of the following is a constellation?
Options: (i) Milky Way (ii) Asteroid (iii) Orion (iv) Comet
Answer: (iii) Orion
(e) We can see the ____________ at night.
Options: (i) Sun (ii) Moon (iii) Earth (iv) planets
Answer: (ii) Moon
(f) What is at the centre of the solar system?
Options: (i) Planets (ii) Earth (iii) Sun (iv) Stars
Answer: (iii) Sun
(g) The closest neighbour of the Earth is the ____________ .
Options: (i) Sun (ii) Neptune (iii) Moon (iv) Pole Star
Answer: (iii) Moon
- Write ‘T’ for true and ‘F’ for false statements:
(a) Stars are huge glowing balls of burning hot gases.
Answer: [T] — True
(b) A satellite is a celestial body that revolves around the Sun.
Answer: [F] — False (Correct statement: A satellite revolves around a planet.)
(c) The Sun is at the centre of the solar system.
Answer: [T] — True
(d) Asteroids are chunks of rock and metal.
Answer: [T] — True
(e) The Earth has no satellite.
Answer: [F] — False (Correct statement: The Earth has one natural satellite, the Moon.)
- Fill in the blanks:
(a) The Sun and the planets together are called the ____________ .
Answer: Solar System
(b) The natural satellite of the Earth is the ____________ .
Answer: Moon
(c) The fixed path along which a planet moves around the Sun is known as ____________ .
Answer: orbit
(d) Sirius is also known as ____________ .
Answer: Dog Star
(e) The smallest planet in the solar system is ____________ .
Answer: Mercury
- Match the following:
| Column A | Column B | Correct Match Answer |
| (a) The path of a planet | (i) Solar System | (a) -> (iii) Orbit |
| (b) The Sun | (ii) Neptune | (b) -> (iv) Star |
| (c) The Earth | (iii) Orbit | (c) -> (v) Planet |
| (d) The planet farthest from the Sun | (iv) Star | (d) -> (ii) Neptune |
| (e) The Sun and its family of planets | (v) Planet | (e) -> (i) Solar System |
GET READY TO ANSWER
- Short answer questions:
(a) Which are the neighbours of our Earth?
Answer: The neighbours of our Earth in space include the Sun, the Moon, other planets (like Venus and Mars), stars, satellites, asteroids, and comets.
(b) The Moon does not have light of its own. Yet, we can see the Moon at night. Why?
Answer: We can see the Moon at night because it reflects the light of the Sun that falls on its surface.
(c) What is a constellation? Name three constellations.
Answer: A constellation is a group of bright stars that forms a recognizable pattern in the night sky. Three examples are:
1. Ursa Major (Great Bear / Saptarishi)
2. Orion
3. Big Dipper
(d) Name the eight planets of the solar system.
Answer: The eight planets in order from the Sun are:
1. Mercury
2. Venus
3. Earth
4. Mars
5. Jupiter
6. Saturn
7. Uranus
8. Neptune
- Long answer questions:
(a) Why is the Sun important to us?
Answer: The Sun is important to us for several key reasons:
1. It provides heat and light necessary for life on Earth.
2. It is the primary source of energy (solar energy), which can be used to cook, run cars, and light up streets.
3. It controls Earth’s climate and weather patterns.
(b) What are satellites? Name the Earth’s satellite.
Answer: Satellites are celestial bodies that revolve around planets in fixed orbits. The natural satellite of the Earth is the Moon.
(c) What is solar energy? What can we use it for?
Answer: Solar energy is the light and heat energy obtained directly from the Sun. We can use solar energy for:
• Cooking food (using solar cookers)
• Generating electricity to light up streets and homes
• Running solar-powered vehicles and heaters
(d) Can we live on the Moon? Give reasons.
Answer: No, we cannot live on the Moon. The reasons are:
1. There is no air (atmosphere) on the Moon to breathe.
2. There is no liquid water available on the surface to support life.
3. It experiences extreme temperature variations.
(e) What is a star?
Answer: A star is a giant celestial body made of burning hot gases that produces and emits its own heat and light.
- HOTS (Higher Order Thinking Skills) Questions:
(a) The Moon is much smaller than the Sun. Yet, it looks big as seen from Earth. Why?
Answer: The Moon looks about the same size as the Sun because it is much closer to the Earth than the Sun. Objects that are closer appear much larger than distant ones.
(b) Is the Moon a star? Give reasons.
Answer: No, the Moon is not a star. Reasons:
1. A star produces its own heat and light, whereas the Moon does not produce light and only reflects sunlight.
2. The Moon is a natural satellite that orbits a planet (Earth), unlike a star.
(c) The Earth is the third planet in the solar system. What would happen if the Earth was closer to the Sun?
Answer: If the Earth were closer to the Sun (like Mercury or Venus), it would receive far too much heat, making temperatures extremely high. Water would evaporate rapidly, and it would be too hot for any living organism to survive.