Extra Questions for Chapter 12 Beyond Earth Class 6 Science Curiosity
Class 6 Science Nature’s Treasures Extra Questions
Multiple Choice Questions (MCQ)
Question 1. What is the main function of stars in ancient navigation?
(a) They provide heat.
(b) They help travellers find their way.
(c) They create light pollution.
(d) They are used for decoration.
Answer
(b) They help travellers find their way.
Question 2. Which constellation is known as "The Hunter"?
(a) Canis Major
(b) Orion
(c) Taurus
(d) Ursa Major
Answer
(b) Orion
Question 3. What do you call the star that remains in the same position in the night sky?
(a) Sirius
(b) Polaris
(c) Betelgeuse
(d) Vega
Answer
(b) Polaris
Question 4. How many official constellations are recognized by the International Astronomical Union (IAU)?
(a) 88
(b) 100
(c) 72
(d) 50
Answer
(a) 88
Question 5. What is the closest star to Earth after the Sun?
(a) Alpha Centauri
(b) Proxima Centauri
(c) Sirius
(d) Betelgeuse
Answer
(b) Proxima Centauri
Fill in the Blanks
1. The imaginary lines that connect stars to form patterns are called _____.
2. The _____ is the star at the center of our Solar System.
3. _____ pollution makes it difficult to see stars in big cities.
4. The _____ is known as the Red Planet.
5. The _____ takes about 27 days to orbit around the Earth.
Answer
1. Constellations
2. Sun
3. Light
4. Mars
5. Moon
True or False
1. Stars do not emit their own light.
2. The Big Dipper is part of the constellation Ursa Major.
3. The Milky Way Galaxy contains only our Solar System.
4. Asteroids are mostly found between the orbits of Earth and Mars.
5. The Sun is the closest star to Earth.
Answer
1. False
2. True
3. False
4. False
5. True
Match the Following
|
Column A |
Column B |
|
A) Orion |
1) The Red Planet |
|
B) Mars |
2) Group of Stars |
|
C) Polaris |
3) The North Stars |
|
D) Sun |
4) Center of the Solar System |
|
E) Comet |
5) Icy body with a tail |
Answer
|
Column A |
Column B |
|
A) Orion |
2) Group of Stars |
|
B) Mars |
1) The Red Planet |
|
C) Polaris |
3) The North Stars |
|
D) Comet |
5) Icy body with a tail |
|
E) Sun |
4) Center of the Solar System |
One Word Answer
Question 1. What do we call the pattern formed by a group of stars in the night sky?
Constellation
Question 2. What is Sun?
The Sun is a star.
Question 3. Name the planet nearest to the ‘Sun’.
Mercury
Question 4. Name the planet nearest to the Earth.
Mars
Question 5. Name the star which is nearest to the Earth other than Sun.
Proxima Centauri
Question 6. What is the other name of Orion?
Hunter
Question 7. Which star is called Morning Star or the Evening Star?
Venus
Question 8. Name the constellation in which Big Dipper lies.
Ursa Major
Question 9. Name the planet which have two moons.
Mars
Question 10. How many constellations were officially listed by the International Astronomical Union (IAU)?
88 constellations
Question 11. Which planet has rings around it?
Saturn
Question 12. Which star is part of the Little Dipper?
Pole Star or Polaris
Question 13. Name the planet farthest from the Sun.
Neptune
Question 14. Which constellation contains the star Sirius?
Canis Major
Question 15. How many planets are there in our Solar System?
Eight
Very Short Answer Questions
Question 1. Why is the Earth called a blue planet?
Answer
From the outer space, the earth appears blue because its three- fourths surface is covered by water. It is, therefore, called a blue planet.
Question 2. What is Universe?
Answer
The Universe is a large space consisting of celestial bodies like the stars, planets, galaxy, dust and gases.
Question 3. What is the primary purpose of constellations in modern astronomy?
Answer
In modern astronomy, constellations help in identifying and locating stars and other celestial objects.
Question 4. What is meant by the ‘Solar System’?
Answer
The sun, eight planets, satellites and some other celestial bodies known as asteroids and meteoroids form the solar system.
Question 5. What is revolution?
Answer
The motion of the earth around the sun in its orbit is known as revolution.
Question 6. What is a galaxy?
Answer
A galaxy is a large system of stars, gas, and dust bound together by gravity.
Question 7. What are asteroids?
Answer
Many small objects in the solar system are rocky and irregular in shape, known as asteroids.
Question 8. Define asteroid belt.
Answer
Many asteroids revolve around the Sun between Mars and Jupiter in a region known as the asteroid belt.
Question 9. What is the shape of the Milky Way Galaxy?
Answer
Our Milky Way Galaxy is a spiral galaxy having a whitish broadband. It looks like a spinning pinwheel
when viewed from top or bottom.
Question 10. How many planets in the solar system are made of gas? Name them.
Answer
Four planets are made out of gas and they are also referred to as gas giants. They are Jupiter, Saturn, Uranus, and Neptune.
Question 11.What are the special characteristics of the Pole Star?
Answer
Pole Star does not move as other stars move and it is part of Little Dipper.
Short Answer Questions
Question 1. Why is Venus known as the Evening Star or the Morning Star?
Answer
Venus is called the Evening Star or the Morning Star because it is often visible at dawn or dusk, shining brightly either in the western sky after sunset or in the eastern sky before sunrise.
Question 2. Explain why the Pole Star is important for navigation.
Answer
The Pole Star is important for navigation because it remains nearly stationary in the sky, indicating the direction of true north. This made it a reliable point of reference for travelers and sailors before the advent of modern navigation tools.
Question 3. Why is the Sun important to our life?
Answer
Sunlight is essential for plants to grow, which provide food and oxygen to animals, including humans. The Sun is responsible for climate, seasons, weather, water cycle, winds—all of which are important for sustaining life on the Earth.
Question 4. Why are stars invisible during the day time?
Answer
Stars are far away from us compared to the Sun. So, the glare of the Sun is much more than the glare of star during the daytime. Therefore stars are not visible during the day time.
Question 5. Write any two points about the planet Mars.
Answer
(i) Mars is the red planet due to reddish soil
(ii) Mars is the fourth planet from the Sun.
Question 6. Why is the Earth called a unique planet?
Answer
The earth is a unique solar system planet because:
- Conditions favourable to supporting life are only to be found on earth.
- The earth is neither too hot nor too cold.
- There are water and air in it, which are very important for our survival.
Question 7. What is the significance of the Milky Way Galaxy in our understanding of the universe?
Answer
The Milky Way Galaxy is significant because it is our home galaxy, containing our Solar System. Studying the Milky Way helps us understand the structure, formation, and evolution of galaxies, as well as the place of our Solar System within the universe.
Question 8. How do comets differ from asteroids?
Answer
Comets are composed of ice, dust, and rocky material and often have a visible coma or tail when they come close to the Sun. Asteroids, on the other hand, are made mostly of rock and metal and do not develop tails.
Question 9. Describe the importance of the Sun in the Solar System.
Answer
The Sun is crucial in the Solar System as it is the primary source of energy, providing the heat and light necessary for life on Earth. It also governs the orbits of the planets and other objects through its gravitational pull.
Long Answer Questions
Question 1. How does a planet differ from a star?
Answer
|
Planet |
Star |
|
The celestial bodies which revolve around the sun in certain orbit are called planets. |
Stars are the celestial bodies which can emit heat and light continuously. |
|
Planets do not twinkle in the sky. |
Stars twinkle in the sky. |
|
They do not have their own light. |
They have their own light. |
|
They revolve around the sun. |
They are fixed at a point. |
|
Planets are small as compared to stars. |
They are very big in size. |
Question 2. What are constellations? Explain some common constellations.
Answer
The group of stars that has a recognisable pattern is called constellation.
Some common constellations are:
- Canis Major: It appears like a dog. It contains a star called Sirius; the brightest star in the night sky.
- Taurus: It looks like is a bull. It contains two types of stars; a group of stars called Pleiades (Krittika). Another star in the constellation is known as Aldebaran (Rohini).
- Orion: This constellation contains three stars in the middle which represent the belt of the hunter. It is also called the hunter. Orion contains other star (nakshatra) known as Betelgeuse (Ardra).