Tag: planets and stars

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Questions Related to planets and stars

Multiple choice evs - ii our earth and our solar system solar system and sun planets and stars introduction to solar system planets sunita's experience in space space exploration
Identify the wrong statement about Mars.

  1. It is called the red planet

  2. It is the last inner planet

  3. It takes 687 days to complete one revolution around the Sun

  4. It has 3 moons
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mars appears to be reddish in color and is hence known as the red planet.

It is the last planet before the belt of asteroids which makes it the last inner planet. 
It takes 687 day to complete one revolution.
It has 2 natural satellites i.e., 2 moons and not 3.

Multiple choice evs - ii our earth and our solar system solar system and sun planets and stars introduction to solar system planets sunita's experience in space space exploration

There is life on Earth because of:

  1. optimum sunlight

  2. presence of water and atmosphere

  3. presence of ozone layer

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Earth is at an optimum distance from the Sun, therefore the sunlight reaching the Earth is not extremely hot. Also, the ozone layer prevents the entry of harmful rays. Presence of water and atmosphere that are essential for life an Earth to grow.

Multiple choice evs - ii our earth and our solar system solar system and sun planets and stars introduction to solar system planets sunita's experience in space space exploration

The planet Mercury:

  1. is a very small planet and hence not visible

  2. is very far from Earth as compared to other planets

  3. remains covered by clouds most of the day time

  4. is hidden by the glare of the Sun and hence not visible during the day time
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mercury is the first planet of our solar system. It is very close to the Sun and is mostly hidden because of excessive light or glare of the Sun. Hence, it is not easily visible. However, it can be seen just before sunrise or just after sunset from places where trees and buildings do not disturb the view.

Multiple choice evs - ii our earth and our solar system solar system and sun planets and stars introduction to solar system planets sunita's experience in space space exploration
Mercury, Venus, Earth and Mars are not among the  _______ planets.

  1. outer

  2. inner

  3. warmer

  4. lighter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A band of asteroids present between Mass and Jupiter separates the planets into inner (planets before the band of asteroids) and outer (planets after the band of asteroids) planets. Mercury, Venus, Earth and Mars lie before the band of asteroids and are called inner planets.

As these planets stay closer to the sun these are among warmer planet and not among the lighter planets.

Multiple choice evs - ii our earth and our solar system solar system and sun planets and stars introduction to solar system planets sunita's experience in space space exploration

Which of the following statements is / are correct ?

  1. A solar panel is made by combining a large number of solar concentrators.

  2. To work properly, wind energy generators need wind speeds of at least about 15 km/h.

  3. Many of the sources ultimately derive their energy

  4. none 
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A solar concentrator uses lenses, called Fresnel lenses, which take a large area of sunlight and direct it towards a specific spot by bending the rays of light and focusing them. Some people use the same principle when they use a magnifying lens to focus the Sun's rays on a pile of kindling or paper to start fires.

Multiple choice evs - ii our earth and our solar system solar system and sun planets and stars introduction to solar system planets sunita's experience in space space exploration

How did planets and other objects in the solar system form?

  1. After the Sun formed, it threw off hot pieces that spun and cooled.

  2. The Sun captured objects that formed in other places in the galaxy.

  3. Two stars collided, and the broken pieces went into orbit around the Sun.

  4. Material in a disc formed large clumps as the Sun fanned in the centre of the disc.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The planets in our solar system are believed to have formed from the same spinning disc of dust that formed the Sun. This disc, called the solar nebula, was composed mainly of hydrogen and helium, but also had other elements in smaller proportions. The nebula had a certain amount of angular momentum orbiting the forming Sun. Particles in the spinning disc began to clump together as gravity attracted them to each other.