Class 6 Science Chapter 12 Extra Questions Beyond Earth
Class 6 Science Chapter 12 Beyond Earth Important Extra Questions and Answers
Beyond Earth Class 6 Extra Questions Very Short Answer Type
Question 1.
Name the largest planet of the solar system.
Answer:
Jupiter is the largest planet of the solar system.
Question 2.
What is a constellation? Name any two constellations.
Answer:
A part of the sky where stars form different patterns is known as constellation.
Orion and the Big dipper are the two examples of constellations.
Question 3.
Name two objects other than planets which are members of the solar system.
Answer:
Asteroids and natural satellites are also the members of the solar system.
Question 4.
In which part of the sky, can you find Venus if it is visible as an evening star?
Answer:
We can find Venus in the western part of the sky as an evening star.
Question 5.
What are the appropriate conditions for night sky watching?
Answer:
Night sky watching can be properly done in villages or open dark areas where there is less light and air pollution.
Question 6.
Do stars emit light only during night?
Answer:
No, stars emit light all the time but during daylight, they are not visible due to the extreme brightness of the sun.
Question 7.
Yangdol and Dorjay observe a bright object in the night sky which was not twinkling. Yangdol says, it is a star and Dorjay says it is a planet. Who is correct?
Answer:
Dorjay was correct as planets do not twinkle. They just shine steadily while stars appear to us as twinkling.
Question 8.
Which is the brightest star in the night sky?
Answer:
Sirius is the brightest star of the night sky.
Question 9.
Which star helps to locate the north direction in the northern hemisphere and how?
Answer:
Pole star helps to locate the North direction in the Northern hemisphere as it appears stationary in the North direction.
Question 10.
Which app is used for the identification of stars, constellations and planets from mobile phones?
Answer:
Sky map or Stellarium
Question 11.
Even though some of the stars are much bigger than Sun, then why does it appear bigger than the other stars?
Answer:
The Sun is much closer to us than the other stars, hence it appears much bigger. Since the other stars are much farther awaly, therefore they appear like points even though they are bigger than sun.
Question 12.
What are craters on the surface of moon?
Answer:
The circular bowl-like structures on the surface of the moon are called craters.
Beyond Earth Class 6 Extra Questions Short Answer Type
Question 1.
Draw a sketch to show the relative position of prominent star in Big dipper.
Answer:
Question 2.
Which planets are called the red planet and the blue planet respectively? Give reasons.
Answer:
Mars is called the red planet because it appears red. This is because the soil on Mars is reddish in colour.
Earth is called the blue planet as a large portion of the Earth’s surface is covered with water and thus, it appears blue from the space.
Question 3.
Explain how the tail of a comet forms.
Answer:
Comets are made up of dust, gases, rocks and ice. As a comet approaches close to the Sun, the frozen material in it starts evaporating. This evaporating material forms the tail of the comet.
Question 4.
Write a short note on Earth’s natural satellite.
Answer:
Earth’s natural satellite is Moon which takes about 27 days to complete one revolution around the Earth. It is our nearest neighbour in the space. There is hardly any atmosphere on the Moon. The Moon is about a quarter the size of the Earth. The Moon’s surface shows circular bowl-like structures called craters.
Question 5.
What constitutes a solar system? How do the objects in a solar system shine?
Answer:
The Sun, eight planets, their Moons and many smaller objects including asteroids, and comets, together form the solar system. The Sun produces almost all the energy in the solar system and all the other objects in our solar system shine due to the sunlight that they reflect from their surfaces.
Question 6.
How can we see the planets which are not visible to the naked eye? Also, which instrument can be used to see the objects in a night sky brighter and larger?
Answer:
A telescope helps us to view many dim objects which are not visible to our naked eyes and a pair of binoculars can be used to see the objects brighter and larger in the night sky.
Question 7.
Suresh made the following sketch of the solar system. Is the sketch correct? If not, correct it.
Answer:
The sketch made is not correct as he has interchanged the position of Mars and Venus and also the positions of Uranus and Neptune.
Asteroid belt is also not located correctly. It should be in between the orbits of Mars and Jupiter.
Question 8.
Which planets are made up of gases and what else is special about these planets?
Answer:
The four outermost planets-Jupiter, Saturn, Uranus and Neptune are mostly made of gases. These giant gaseous planets have large flat ring-like structures around them which are made of dust particles and rocky material.
Beyond Earth Class 6 Extra Questions Long Short Answer Type
Question 1.
Explain how you can locate the Pole star with the help of the big dipper.
Answer:
To find the Pole star using the Big dipper, you can follow these steps
(a) Find the constellation Locate Big dipper in the northern night sky.
(b) Identify the quadrilateral Look for the part of the constellation that looks like a quadrilateral.
(c) Connect the end stars Imagine a straight line connecting the two stars present at the end of the quadrilateral.
(d) Extend the line Extend the imaginary line towards the North direction. This imaginary line meets Pole star.
(e) Find the faint star The Pole star is the faint star that appears roughly five times the distance between the two stars you connected.
Question 3.
Why Venus is hotter than Mercury, although it is farther from the Sun?
Answer:
Planets get most of their energy from the Sun. So, the farther they are, the colder they are in general. But the presence of an atmosphere on a planet can trap heat which can significantly change the temperature of a planet and Venus has a thick atmosphere which traps heat and create greenhouse effect. That is why, Venus is hotter than Mercury, although being farther from the Sun.
Question 4.
Give an activity to identify Orion constellation and locate Sirius star.
Answer:
Refer to Activity 3.
Question 5.
What is the story of planet Pluto?
Answer:
When Pluto was discovered, it was called a planet of the solar system that lies farther than Neptune and revolves around the Sun. But later, when similar more small objects were discovered, the International Astronomical Union (IAU) in 2006 redefined the requirements of an object to be called a planet. As per this definition, these smaller objects, including Pluto, are now called dwarf planets.
Beyond Earth Class 6 Extra Questions Skill Based
Question 1.
The given figure shows comets without their tail. Show the tails of the comets at position A, B and C. In which position will the tail be longest? Analytical Skill
Question 2.
How would the Earth be affected, if it is taken (a) too nearer or (b) too far from the Sun? Thinking Skill
Question 3.
Crack the following riddle and create one more of the similar type. Thinking Skill
My first is in VAN but not in PAN
My second is in EARTH and also in HEAVEN
My third is in ONE but not in TWO
My fourth is in BUN and also in FUN
My last is in STAR but not in RADAR
I am a planet that moves around the Sun.
Answer:
Venus
Question 4.
Observe the given picture of the night sky and try to form patterns of your own by joining the stars with imaginary lines. Give names to each object or character that you will form. Analytical Skill