Chapter – 25
Our Earth and The Space
Q1. What all have you seen in the sky?
Ans- We have seen polar star, stars, moon and sun in the sky.
Q2. Why cannot we see directly towards the sun?
Ans- Due to the sun’s bright light we cannot see directly towards the sun.
Q3. Draw the Saptarishi constellation.
Q4. What is the difference between an aeroplane and a spacecraft?
Ans- An aeroplane can move anywhere in the earth, but a spacecraft can move only in the space. A spacecraft moves 50 times faster than an aeroplane.
Q5. If you go to the space, what preparations you would take?
Ans- The preparation for a space travel includes the following:
The practice of eating a different kind of food.
To work in specific conditions
To live in the absence of gravitational force.
To live in high pressure and weightlessness.
Q6. Which Indians have travelled to the space?
Ans – Rakesh Sharma was the first Indian astronaut who went to the space. The women astronaut from India who travelled to the space are Kalpana Chawla and Sunita Williams
Q7. Write the name of the planet nearest to the sun.
Ans- Mercury is the nearest planet to the sun.
Q8. Which is the biggest planet of the solar system?
Ans- Jupiter is the biggest planet in the solar system.
Q9. Write the names of the 8 planets from the sun in sequence.
Ans- The 8 planets of the sun – Mercury. Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
Q10. Observe the changes in the shape of the moon. Write the dates (tithi) on which these views of the moon ,are visible.
Picture 1 : Ditiya
Picture 2 : Panchmi
Picture 3 : Teras
Picture 4 : Poomima