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Our Universe (HBBVS)

Description: OUR UNIVERSE
Number of Questions: 28
Created by:
Tags: OUR UNIVERSE Stars and Their Visibility Different Types of Constellations and Their Formation Composition of Solar System and Its Movement Various Planets in Our Solar System Stars and Solar System Meteors and Meteorites Moon: A Celestial Body Artificial Satellite
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In which of the following arms of Milky Way galaxy is our solar system situated?

  1. Orion Arm

  2. Sagittarius Arm

  3. Crux Centaurus Arm

  4. Perseus Arm

  5. Central Bulge

Show answer
Correct Option: A
Explanation:

Our solar system is situated in Orion Arm of Milky Way galaxy.

Which of the following is the nearest star to Earth?

  1. Proxima Centauri

  2. Alpha Centauri

  3. Sun

  4. Ursa Major

  5. Sirius

Show answer
Correct Option: C
Explanation:

Sun is the closest star to Earth.

Why do different constellations appear at different time periods of the year?

  1. Due to rotation of Earth

  2. Due to revolution of Earth

  3. Due to revolution of the constellations around Earth

  4. Due to distance between Earth and the constellations

  5. Due to change in the shape of the constellations

Show answer
Correct Option: B
Explanation:

Different constellations appear in the night sky at different time periods of the year due to revolution of Earth.

Most of the white light that makes our world visible comes from which layer of the sun?

  1. Core

  2. Corona

  3. Chromosphere

  4. Photosphere

  5. Convection zone

Show answer
Correct Option: D
Explanation:

Photosphere is the part of the sun we actually see. Most of the white light that makes our world visible comes from photosphere of the sun.

What is the study of the universe called?

  1. Topology

  2. Mycology

  3. Cytology

  4. Cosmology

  5. Ornithology

Show answer
Correct Option: D
Explanation:

Cosmology is the study of the universe.

Which of the following planets has equal periods of rotation and revolution?

  1. Mercury

  2. Mars

  3. Venus

  4. Jupiter

  5. Saturn

Show answer
Correct Option: B
Explanation:

The periods of rotation and revolution of Mars are equal.

Which of the following parts of the sun is visible during a total solar eclipse?

  1. Photosphere

  2. Chromosphere

  3. Corona

  4. Core

  5. None of these

Show answer
Correct Option: C
Explanation:

During a total solar eclipse, corona is the only visible part.

Which of the following are the inner planets?

  1. Mars, Venus, Earth and Jupiter

  2. Mercury, Venus, Earth and Neptune

  3. Jupiter, Saturn, Neptune and Uranus

  4. Mercury, Neptune, Uranus and Jupiter

  5. Mercury, Venus, Earth and Mars

Show answer
Correct Option: E
Explanation:

Mercury, Venus, Earth and Mars are the outer planets. They have none or very few satellites or moons and lie between the sun and the asteroid belt.

On which of the following planets does the sun rise from the West and sets in the East?

  1. Earth

  2. Mars

  3. Venus

  4. Mercury

  5. Jupiter

Show answer
Correct Option: C
Explanation:

Venus revolves in a clockwise direction from East to West. So, the sun rises from the East and sets in the West.

Which of the following statements is true?

  1. Hottest stars are blue and coolest are red in colour.

  2. Hottest stars are yellow and coolest are blue in colour.

  3. Hottest stars are red and coolest are blue in colour.

  4. Hottest stars are white and coolest are blue in colour.

  5. Hottest stars are violet and coolest are green in colour.

Show answer
Correct Option: A
Explanation:

We can determine the temperature of the stars by determining their colour. Hottest stars are blue and coolest are red in colour.

Which of the following planets has the largest natural satellite?

  1. Mercury

  2. Venus

  3. Jupiter

  4. Mars

  5. Saturn

Show answer
Correct Option: C
Explanation:

Jupiter has 67 moons and it has the largest satellite, named Ganymede.

Why do planets revolve around the sun in definite elliptical orbits?

  1. Friction between the sun and the planets makes the planets revolve.

  2. The planets exert gravitational pull among each other.

  3. The planets are spherical in shape.

  4. There is a magnetic pull between the planets and the sun.

  5. The sun exerts immense gravitational pull.

Show answer
Correct Option: E
Explanation:

The sun exerts immense gravitational pull due to which the planets revolve around it in an elliptical orbit.

Which planet was first discovered by using a telescope?

  1. Jupiter

  2. Uranus

  3. Mars

  4. Neptune

  5. Mercury

Show answer
Correct Option: B
Explanation:

Uranus was the first planet discovered by using a telescope.

Which of the following can form craters by hitting the ground?

  1. Asteroids

  2. Comets

  3. Meteors

  4. Shooting stars

  5. Meteorites

Show answer
Correct Option: E
Explanation:

The rocks that are not burnt out completely in Earth's atmosphere and are able to reach Earth's surface are called meteorites.

What is the shape of Milky Way galaxy?

  1. Elliptical

  2. Spherical

  3. Irregular

  4. Spiral

  5. Cylindrical

Show answer
Correct Option: D
Explanation:

Milky Way galaxy is spiral in shape.

Other than sun, 8 planets, dwarf planets and satellites, the components of the solar system are called

  1. medium solar system bodies

  2. very small solar system bodies

  3. very large solar system bodies

  4. large solar system bodies

  5. small solar system bodies

Show answer
Correct Option: E
Explanation:

Small solar system bodies are the components of the solar system.

Which of the following is the least dense planet?

  1. Venus

  2. Saturn

  3. Earth

  4. Neptune

  5. Jupiter

Show answer
Correct Option: B
Explanation:

Saturn is the least dense planet (its density being almost one-eighth of that of Earth). Its density is less than water.

Which of the following planets has its poles covered with pink snow of frozen nitrogen?

  1. Mars

  2. Neptune

  3. Mercury

  4. Earth

  5. Jupiter

Show answer
Correct Option: B
Explanation:

Neptune has its surface covered with ice and the poles have pink snow of frozen nitrogen.

What is the Indian name given to the constellation Sagittarius?

  1. Makar

  2. Mriga

  3. Simha

  4. Vrischika

  5. Dhanu

Show answer
Correct Option: E
Explanation:

Dhanu is the Indian name of Sagittarius.

Venus is not the nearest planet to the sun, but still it is the hottest planet in the solar system. This is due to

  1. the presence of excess carbon dioxide, nearly 90% to 95%

  2. its clockwise rotation

  3. the reflection of 3/4th sunlight falling on its surface

  4. the absence of moon

  5. nearly equal period of revolution and rotation

Show answer
Correct Option: A
Explanation:

Venus is the hottest planet because carbon dioxide present in its atmosphere traps the heat due to its greenhouse behaviour.

Which of the following conditions is not fulfilled by Pluto?

  1. It orbits around the sun.

  2. It has sufficient mass to assume a round shape.

  3. It is not a natural satellite.

  4. It has cleared the neighbourhood around its orbit.

  5. None of these

Show answer
Correct Option: D
Explanation:

The orbit of revolution of Pluto overlaps that of Neptune. Thus, Pluto is now called a dwarf planet.

When does a solar eclipse occur?

  1. When Earth comes between the moon and the sun

  2. When there is a full moon day

  3. When the moon comes between Earth and the sun

  4. When there is a high tide

  5. When the sun comes between the moon and Earth

Show answer
Correct Option: C
Explanation:

When the moon comes between Earth and the sun, a solar eclipse occurs.

When the shape of the moon grows, it is known as

  1. waning

  2. gibbous moon

  3. full moon

  4. waxing

  5. new moon

Show answer
Correct Option: D
Explanation:

Waxing is the name given to the phase when the shape of the moon grows.

Why does a solar eclipse last for a short time only?

  1. Earth's shadow covers only a small portion of the sun.

  2. Earth moves quickly in its orbit.

  3. The moon has to pass the shadow of the sun.

  4. The moon's shadow covers only a small portion of the sun.

  5. The moon's shadow covers only a small portion of Earth.

Show answer
Correct Option: E
Explanation:

The moon's shadow covers only a small portion of Earth, where the eclipse is visible. As the moon moves in its orbit (at 1 km/hr), the position of the shadow changes very quickly.

In which of the following tides are moon, Earth and sun in the same line?

  1. Low tide

  2. Neap tide

  3. Spring tide

  4. Autumn tide

  5. High tide

Show answer
Correct Option: C
Explanation:

Spring tides occur when moon, Earth and sun are in the same line.

Which of the following was the first satellite to be launched by India?

  1. Bhaskara

  2. Kalpana

  3. EDUSAT

  4. Chandrayan-1

  5. Aryabhatta

Show answer
Correct Option: E
Explanation:

Aryabhatta was the first Indian satellite launched on 19th April, 1975.

Which of the following is the time period between high tide and low tide?

  1. 6 hours 12 minutes

  2. 6 hours

  3. 5 hours 30 minutes

  4. 12 hours

  5. 24 hours

Show answer
Correct Option: A
Explanation:

The time period between high tide and low tide is 6 hours 12 minutes.

Which of the following satellites is used to observe distant planets, galaxies and other outer-space objects?

  1. Communication satellites

  2. Weather satellites

  3. Military satellites

  4. Astronomical satellites

  5. Navigational satellites

Show answer
Correct Option: D
Explanation:

These satellites are used to observe distant planets, galaxies and other outer-space objects.

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