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Q1: Answer the following questions briefly
a. How does a planet differ from a star?
Ans: A star has its own heat and light whereas a planet does not possess any heat or light it receives them from Star.
b. What is meant by the solar system?
Ans: The solar system is the collection of the sun, 8 planets, moons, meteors, and asteroids.
c. Name all the planets according to their distance from the sun.
Ans: The list of planets according to their distance from the sun is as follows:
d. Why is the Earth called a unique planet?
Ans: The earth is called a unique planet because this is the only planet that supports life. It is neither too hot nor too cold. The things necessary for survival such as oxygen and water are found here.
e. Why do we see only one side of the Moon always?
Ans: Moon takes 27 days to revolve around the earth and the same amount of time to rotate on its axis; hence, we see only one side of the moon.
f. What is the universe?
Ans: The universe is the collection of millions of billions of galaxies.
Q2: Tick the correct answer
a. The planet known as the "Earth's twin" is
Ans: (iii) Venus
b. Which is the third nearest planet to the sun?
Ans: (ii) Earth
c. All planets move around the sun in a
Ans: (iii) Elongated path
d. The pole star indicates the direction to the
Ans: (ii) North
e. Asteroids are found between the orbits of
Ans: (ii) Mars and Jupiter
Q3: Fill in the blanks
a. A group of stars forming various patterns is called a constellation.
b. A huge system of stars is called Galaxy.
c. Moon is the closest celestial body to our Earth.
d. The earth is the third nearest planet to the sun.
e. Planets do not have their own heat and light.