Tag: galaxies

Questions Related to galaxies

Age of sun is about:

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. 4.5 billion years

  2. 45 million years

  3. 10 thousand years

  4. Hundred thousand years

Show answer
Correct Option: A
Explanation:

Sun is about 4.5 billion years old. 

It is still younger than many other stars.

Inside the Sun, _______ reactions take place at high temperature and enormous pressure. Fill in the blank
physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. nuclear fusion

  2. nuclear fission

  3. catalyze

  4. none of the above

Show answer
Correct Option: A
Explanation:

Nuclear fusion means merging of separate elements as a unified whole to form heavy nuclei resulting in release of enormous amount of energy.

Sun is:

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. a hot ball of glowing gases

  2. a cold rock

  3. a cold sphere of gases and moisture

  4. a solid sphere of minerals

Show answer
Correct Option: A
Explanation:

The sun is a star.

A hot ball of glowing gases.

What is the angular size of Sun?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. $0.5'$

  2. $1.5'$

  3. $0.2'$

  4. $2.5'$

Show answer
Correct Option: A
Explanation:

The angluar size of the Sun is 30 arcmin, 

i.e., approx $0.5'$.

How much thick is the photosphere of sun?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. 500km

  2. 5000km

  3. 50km

  4. 5km

Show answer
Correct Option: A
Explanation:

The deepest layer of the Sun is the photosphere. This layer is the thinnest layer comprising of just 500 km in thickness.

From which part of Sun does the energy from nuclear fusion is generated?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. Core

  2. Radiative Zone

  3. Convective Zone

  4. From both B and C

Show answer
Correct Option: A
Explanation:

Central region of the Sun is called the core. Core is where the nuclear reaction takes place. 

Core is the region where the energy from nuclear fusion is generated.

The diameter of Sun is _________times larger than diameter of largest planet Jupiter.

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. 10

  2. 12

  3. 20

  4. 15

Show answer
Correct Option: A
Explanation:

The diameter of the Sun is 1.3914 million km, it is 109 times larger than the diameter of the Earth and 10 times larger than Jupiter.

What are known as Sun Spots?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. Cooler regions on photosphere

  2. Hotter regions on photosphere

  3. Cooler regions on stratosphere

  4. Hotter regions on stratosphere

Show answer
Correct Option: A
Explanation:

Spots formed on the surface of the Sun that are darker and cooler are called the Sun's spots.

They may differ in size from small to large also.

Sun has so much mass because of this it produces its own light. Is this statement true or False

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

This statement is false the Sun generates its own light due to Nuclear Fission not due to its large mass.

What is the Sun made of?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. 94% hydrogen, 6% helium, 0.16% other materials

  2. 94% hydrogen, 6% helium, 0.13% other materials

  3. 99% hydrogen, 6% helium, 0.11% other materials

  4. 94% hydrogen, 6% helium, 0.11% other materials

Show answer
Correct Option: B
Explanation:

Sun is a large mass of gases. Two prominent gases forming the Sun are hydrogen and helium. Other gases such as carbon, nitrogen forms the trace amount.

The sun is made of 94% hydrogen, 6% helium, 0.16% other materials.