The Earth

Q.

Calculate the speed of light in kilometres per hour.

Q. Why sometimes the moon appears to be yellow orch or orange in colour? 🌕

Q. Who was the first one to say that our earth is round in shape?

Q.

Define orbit.

Q. Which of these explain why the Sun is not visible during night?

1. The Moon blocks the Sun's view.
2. The bright side of the Moon faces away from the sun
3. The Sun stops creating light at night
4. That side of Earth faces away from the Sun

Q.

Statement 1: Planets revolving around the sun never collide. Statement 2: Planets revolve around the sun in a definite path known as orbit.

Q.

In which part of the sky can you find Venus if it is visible as an evening star?

Q.

What is meant by apogee and perigee, eccentricity? How do we calculate them?

Q. The light from the Sun reaches Earth in approximately

1. 24 hours
2. 8 minutes
3. 1 hour
4. 1 minute

Q.

Which planet is fourth from the sun?

1. Mercury

2. Venus

3. Mars

4. Jupiter

Q.

Earth takes 365 days to revolve around the Sun whereas, Mars takes 687 days to complete one revolution around the sun. Why do Mars take more time than earth to complete its revolution around the Sun?

Q. Why is night sky black and early morning sky is blue?

Q.

What does the solar system consist of?

Q.

What is importance of pole star

Q. what is distance between the sun and the earth

Q.

A satellite is revolving around the Earth in a well defined circular orbit, the gravitational force between the Earth and satellite is the centripetal force of the circular motion. What can we say about the motion of the satellite if the gravitational force becomes zero?

1. The satellite will move tangentially

2. The satellite would come at rest

3. The satellite will continue moving in its circular orbit

4. None of these

Q.

Which planet has the most circular orbit?

1. Mercury

2. Venus

3. Earth

4. Mars

Q.

The daily motion of the earth is .

Q. If the distance between the Sun and the Earth reduces to half, what will be its effect on Earth?

1. 
   There will be no seasons.
2. 
   There will be a rise in temperature in summer as well as in winter.
3. 
   There will be a rise in temperature in summer only.
4. 
   The day will remain for all the 24 hours.

Q.

The force with which th earth attracts an object towards itself ___________

Q. the distance between the sun and earth is 180, 000 miles and light travels at the speed of 299 792 458 m / s then why does the light of sun takes so much time to travel to earth as the speed of light is it must come lot before than 8 minutes

Q. What is the name of the first artificial satellite launched into space?

1. Sputnik I
2. EDUSAT
3. IRS
4. INSAT

Q.

How will our Earth look when seen from a space - ship or Moon?

Q.

State one important consequence of each of the following:

(a) Rotation of Earth on its axis.

(b) Motion of tilted Earth around the Sun.

Q. Stars appear to move from ___________.

1. South to North
2. East to West
3. North to South
4. West to East

Q. Which of the following planet does not have atmosphere?

1. Jupiter
2. Mars
3. Mercury
4. Saturn

Q. Which is the brightest star

Q.

On which planet is life known to exist?

1. Mars

2. Venus

3. Jupiter

4. Earth

Q. How much time does earth take
(a) to revolve once around the sun
(b) to complete one rotation around its own axis

Q. The light from the Sun reaches Earth in approximately

1. 1 hour
2. 24 hours
3. 1 minute
4. 8 minutes