Additional Question:
Que: Name two celestial bodies visible only in the night sky.
Ans: The moon qand the stars are celestial bodies visible in the night sky.
Que: Why do we not feel the heat and light of the stars, even throught they are so big and hot?
Ans: We do not the heat and light of the stars snice they are very far away.
Que: From which Greek word is the word 'planet' derived?
Ans: The word 'planet' is derived from rthe Greek word 'Planetai'.
Que: What does the solar family of?
Ans: The solar family consists of the sun, planets, their satellites, and asteroids and meteoroids.
Que: What is the shape of the orbits in which plants revolve around the sun?
Ans: The orbits of planets are elliptical in shape.
Que: which planet is called "Earth's twin" and why?
Ans: Venus is called "Earth's twin" because it is similar to earth in its shape and size.
Que: What is "Geoid".
Ans: A sphere with its ends flattened at poles is called the geoid.
Que: Why is earth called "blue planet".
Ans: Earth appears blue from when seen from the outer space since it has over 2/3rd water. So it is called the blue plants.
Que: What is the difference between the moon and INSAT?
Ans: The moon is a natural satellite of the earth while INSAT is an artifical satellite.
Que: What are meteoroid?
Ans: Small pieces of rocks which which move around the sun are called meteoroids.
Que: What are asteroids?
Ans: Asteroids are numerous tiny celestial bodies which revolve around the sun and are mainly found between the orbits of mars and jupiter.
Que: Name the two extreme shapes of the moon. When and at what intervals do they occur?
Ans: The moon is seen in its two extreme shape on the Full Moon night arid the New Moon night. The Full Moon. The full Moon means the moon in its full circular shape. The New Moon. The New Moon means the moon that can not be a seer. The New Moon occurs on the last day of the hindi calendar month.
Que: What is the pole star? How can the saptarishi be used to locate it?
Ans: The Pole satar is the star that is known to retain its postition in rthe sky always. We can locate the positional of the Pole star with the help of the constellation Saptarishi. If an imaginary line is drawn joining the "pointer stars" of the Saptarishi and extended further, it will point the pole star. The Pole star the pointer stars lie on the same line.
Que: Write a short note on the two plants nearest to the sun.
Ans: Mercury It is the nearest plants to the sun. It takes just about 88 earth days to revolve once aroun the sun. It is extremely hot since it is close to the sun. It is also the smallest plants. Venus, It is the second closest plants to the sun. It is similar to earth in shape and size. It is called "Earth's twin".
Que: How does earth support life?
Ans: The earth has conditions that support life/. It is neither too hot nor too cold. It was both water and air, which are both indispensable for life. Presence of oxygen in the air in an appropriate proportion supports life. These factors make the earth a unique planst.
