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Olympiad Test Level 1: Our Earth and Universe- 2


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15 Questions MCQ Test GK Olympiad for Class 6 | Olympiad Test Level 1: Our Earth and Universe- 2

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Olympiad Test Level 1: Our Earth and Universe- 2 - Question 1

Each planet in the solar system has seasons. On which of the following planets, the length of each season is of about 3 years?

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 1

Jupiter, like Venus, has an axial tilt of only 3 degrees, so there is literally no difference between the seasons. However, because of its distance from the sun, seasons change more slowly. The length of each season is roughly three years.

Olympiad Test Level 1: Our Earth and Universe- 2 - Question 2

Stars are enormous spheres of ignited gas that light the cosmos. They come in many different types and sizes. Which among the following is not a known type of star?

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 2
  • White dwarf: When a star has completely run out of hydrogen fuel in its core and lacks the mass to force higher elements into fusion reaction, it becomes a white dwarf star. 
  • Red dwarf: Red dwarf stars are the most common kind of stars in the Universe. These are main sequence stars but they have such low mass that they’re much cooler than stars like our Sun. The smallest red dwarfs are 0.075 times the mass of the Sun, and they can have a mass of up to half of the Sun.
  • Red giant: A red giant is a star that is past its peak and has consumed its core's supply of hydrogen fuel. As a result, helium has built up in the core, hydrogen has fused in the outer shells, and the star has expanded into a giant red monstrosity.
Olympiad Test Level 1: Our Earth and Universe- 2 - Question 3

Proxima Centauri, the closest star to Earth after Sun is a type of ________.

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 3
  • Red dwarf stars are the most common kind of stars in the Universe. These are main sequence stars but they have such low mass that they’re much cooler than stars like our Sun. The smallest red dwarfs are 0.075 times the mass of the Sun, and they can have a mass of up to half of the Sun. 
  • At 4.2 light years away Proxima Centauri is the nearest star to the sun. It is a very small red dwarf with a radius of around 97,000 km, which is around 14% the size of our sun.
Olympiad Test Level 1: Our Earth and Universe- 2 - Question 4

What percent of the Earth’s water is found in the atmosphere?

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 4

The ocean holds about 97 percent of the Earth's water; the remaining three percent is distributed in many different places, including glaciers and ice, below the ground, in rivers and lakes, and in the atmosphere. At any given time only about 0.001 percent of Earth's water is in the form of atmospheric vapour, a surprisingly small number given its crucial role in weather.

Olympiad Test Level 1: Our Earth and Universe- 2 - Question 5

Outermost layer of Earth is

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 5

The crust is the outermost layer of the Earth’s surface, where we live. The thickness ranges from 0 to 60 kilometres.
It’s a solid rock layer that comes in two varieties:

  • Continental crust covers the land
  • Oceanic crust covers water
Olympiad Test Level 1: Our Earth and Universe- 2 - Question 6

Earth spins on its own

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 6

Earth's rotation or Earth's spin is the rotation of planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space. Earth rotates eastward, in prograde motion. As viewed from the northern polar star Polaris, Earth turns counterclockwise.

Olympiad Test Level 1: Our Earth and Universe- 2 - Question 7

Time which earth takes to complete its one revolution is

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 7

The earth takes exactly 365 days and 6 hours to complete one revolution which is equal to approximately 365 days.

Olympiad Test Level 1: Our Earth and Universe- 2 - Question 8

When does Lunar Eclipse happen?

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 8

Eclipses of the Moon happen at full Moon, when the Sun, Earth and Moon are aligned to form an exact or an almost straight line.

Olympiad Test Level 1: Our Earth and Universe- 2 - Question 9

Lunar eclipse can be seen when there is

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 9

A lunar eclipse only occurs during a full Moon, when the Sun, Earth, and Moon are all aligned. But despite the Moon only taking 29.5 days to orbit Earth and complete a cycle from full Moon to full Moon, there are only on average about three lunar eclipses every year.

Olympiad Test Level 1: Our Earth and Universe- 2 - Question 10

Rotation of Earth gives the

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 10

The Earth rotates on its axis. As rotation occurs, only one-half of the Earth faces the Sun and that has day while the other has night. This causes us to experience day and night. Thus, the rotation of the Earth gives rise to day and night.

Olympiad Test Level 1: Our Earth and Universe- 2 - Question 11

Imaginary line which runs through center of Earth is called

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 11
  • The earth we live on is a sphere that rotates daily on its axis.
  • The axis is an imaginary line that runs through the center of the earth from top to bottom.
  • It passes through both the North and the South Poles.
  • The Poles are imaginary points marking the "top" and "bottom" of our earth.
Olympiad Test Level 1: Our Earth and Universe- 2 - Question 12

Which is smallest planet of ‘Solar System’?

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 12

Mercury is the smallest planet in the Solar System and the closest to the Sun. Its orbit around the Sun takes 87.97 Earth days, the shortest of all the Sun's planets.

Olympiad Test Level 1: Our Earth and Universe- 2 - Question 13

Two halves in which Earth is divided are called

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 13

The Hemispheres of the Earth in geography and cartography refer to any division of the globe into two hemispheres.
The most common such divisions are by latitudinal or longitudinal markers:

  • North-South: Northern Hemisphere, the half that is north of the equator
    Southern Hemisphere, the half that lies south of the equator
  • East-West: Eastern Hemisphere, the half that lies east of the prime meridian and west of the 180th meridian
    Western Hemisphere, the half that lies west of the prime meridian and east of the 180th meridian
Olympiad Test Level 1: Our Earth and Universe- 2 - Question 14

How many constellations are there in the sky?

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 14

Over half of the 88 constellations, the IAU recognizes today are attributed to ancient Greek, which consolidated the earlier works by the ancient Babylonian, Egyptian and Assyrian.

Olympiad Test Level 1: Our Earth and Universe- 2 - Question 15

Orbit period of smallest planet ‘Mercury’ is

Detailed Solution for Olympiad Test Level 1: Our Earth and Universe- 2 - Question 15

Mercury is the smallest planet in the Solar System and the closest to the Sun. Its orbit around the Sun takes 87.97 Earth days, the shortest of all the Sun's planets.

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