CURIOUSITY QUIZ: THE SUN

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Test Your knowledge on the 'The Sun' devised on the occasion of the Launch of Aditya L1 spacecraft to the Sun by ISRO. Attempt all the questions by clicking on the right option. Submit the completed Form by clicking the 'Submit' button at the end of the Form. Get your score and the correct answer by clicking the 'View score' button. Good Luck! You can also write your comments on the quiz in the Comment space given at the end of this Page or send your comments and questions related to this quiz for an answer directly to the email account given below:
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What is the distance of the Sun from the Earth ?

1 point

151.13 billion km

151.13 million km

101.13 million km

251.13 million km

Clear selection

What is the Mass of the Sun?

1 point

1.989 ×10 ^ 30 kg

7.342×10 ^ 23 kg

1.989 ×10 ^ 24 kg

1.989 ×10 ^ 20 kg

Clear selection

What is the diameter of the Sun? How many times is it in comparison to our Earth's diameter ?

1 point

1.3927 million km ; 100 times our Earth's diameter

1.3927 million km ; 109 times our Earth's diameter

1.3927 million km ; 209 times our Earth's diameter

1.3927 billion km ; 109 times our Earth's diameter

Clear selection

What is the surface Temperature of the Sun?

1 point

10,000 degree Celsius

5500 degree Celsius

4500 degree Celsius

15 million degree Celsius

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The dark spots seen on the Sun's surface are called:

1 point

Solar Speculm

Craters

Maria

Sunspots

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The source of Sun's energy is :

1 point

Chemical reaction (Exothermic)

Thermo-nuclear fusion

Nuclear Fission

Combustion of Fossil fuel

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The visible surface of the Sun is called :

1 point

Photosphere

Chromosphere

Corona

Solar Flare

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An intense localized eruption of electromagnetic radiation in the Sun's atmosphere is called :

1 point

Magnetic Storm

Solar Flare

Solar Prominences

Coronal Mass Ejection

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What is the age of the Sun ?

1 point

6.51 billion years

5.51 billion years

4.603 billion years

4.51 million years

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These are large bright features extending outward from the Sun's surface:

1 point

Solar Flare

Solar Prominences

Coronal Mass Ejection

Solar Storm

Clear selection

What is the name of the spacecraft to have first reached the Sun?

1 point

Luna 2 (Russia)

Parker Solar probe (NASA)

Apollo 11 (NASA)

Cassini-Huygens Probe (ESA)

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Which element the Sun is primarily made of?

1 point

Carbon

Hydrogen

Helium

Silicon

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When the Sun will run out of its hydrogen fuel, it will expand for some time to a Red Giant stage. After the Red Giant stage, approximately after five billion years, the Sun will continuously contract due to gravity to eventually become a:

1 point

White Dwarf

Black Hole

Neutron Star

Brown Dwarf

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What is the temperature at the Sun's core ?

1 point

6000 degree Kelvin

15 billion degree Celsius

1.5 million degree Celsius

15 million degree Celsius

Clear selection

Who first proposed that the source of the Sun's energy is nuclear ?

1 point

Enrico Fermi

Max Planck

Hans Bethe

Albert Einstein

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In the Hertzsprung-Russell (H-R) diagram , the Sun is a :

1 point

White dwarf

Neutron Star

Red Giant

G-type Main Sequence Star

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Every second, the Sun's core fuses about 600 million tons of hydrogen nuclei into helium and, in the process , how much matter is converted to energy?

1 point

1 billion ton

4 million tons

14 million tons

1 million ton

Clear selection

How does the Sun's heat reach the Earth although the intervening space is completely vacuum?

1 point

By Conduction

By Convection

By Radiation

By a combination of Convection and Radiation

Clear selection

How much time does light take to reach Earth from the Sun ?

1 point

8.3 sec

8.3 minutes

10 minutes

10 seconds

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The apparent path of the Sun's annual motion around the Earth is called :

1 point

Sun's orbit

Zodiac Belt

Aphelion

Ecliptic

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Who first proposed that the Sun is the centre of the Solar System?

1 point

Tycho Brahe

Nicolaus Copernicus

Johannes Kepler

Galileo

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The nearest point of approach of a planet from the Sun in its elliptical orbit is called :

1 point

Apogee

Perigee

Perihelion

Aphelion

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The dark lines seen in the Sun's continuous spectrum corresponding to the absorption of certain spectral wavelengths of elements present in the Sun's cooler outer atmosphere are called :

1 point

Hydrogen emission lines

Raman lines

Raleigh lines

Fraunhofer lines

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What is the name of the galaxy the Sun belongs to ? What is the shape of the galaxy? How many stars approximately does it contain?

1 point

Andromeda galaxy; Spiral; 100 billion stars

The Milky Way; Spiral; 100 million stars

The Milky Way; Elliptical; 100 billion stars

The Milky Way; Spiral; 100 billion stars

Clear selection

What is the state of matter in the Sun's core?

1 point

A mixture of liquids and gases

Liquid

Gas

Plasma

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These are huge bubbles of coronal plasma threaded by intense magnetic field lines that are ejected from the Sun over the course of several hours:

1 point

Solar Flares

Coronal Mass Ejections

Solar Wind

Solar Prominences

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It is a stream of charged particles released from the upper atmosphere of the Sun and mostly consisting of electrons, protons and alpha particles with high kinetic energy (between 0.5 and 10 keV):

1 point

Solar Flares

Coronal Mass Ejections

Solar Wind

Solar Prominences

Clear selection

There are five Lagrange points ( e.g. L1, L2, L3, L4 and L5) between a two body system of the Sun and the Earth where the gravitational attractions of the Sun and the Earth just balance each other. Why most solar probes (including India's Aditya L1) are preferred to be placed at the Lagrange point L1 only?

1 point

It requires very less energy to keep the satellite in orbit at point L1.

Li point is nearest to the Earth than other Lagrange points.

The point L1 offers a continuous and uninterrupted observation of the Sun which is ideal for its study.

All the above answers are correct.

Clear selection

India's first solar probe Aditya L1 was launched on September 2 , 2023 to study the Sun with its onboard scientific instruments. How many total scientific payloads does it carry ?

1 point

Clear selection

India's first solar probe Aditya L1 was launched on September 2 , 2023 to study the Sun with its onboard scientific instruments. What are the primary objectives of Aditya L1?

1 point

Study of Solar upper atmospheric (chromosphere and corona) dynamics

Observe the in-situ particle and plasma environment providing data for the study of particle dynamics from the Sun

To study the physics of solar corona and its heating mechanism

All the above answers are correct.

Clear selection

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