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15 Questions

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What is a Star?

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Questions and Answers

What is the primary force that holds a star together?

Weak nuclear force

Gravitational force (correct)

Strong nuclear force

Electromagnetic force

What process drives the formation and development of stars?

Nuclear fusion reactions (correct)

Magnetic interactions

Evaporation

Chemical reactions

What is the initial source of energy for stars like the sun?

Helium and oxygen reaction

Hydrogen and helium reaction (correct)

Nitrogen and oxygen reaction

Carbon and nitrogen reaction

What is the interstellar medium (ISM) composed of?

Gas and dust Signup and view all the answers

What causes the collapse of clouds of gas and dust in outer space?

Gravitational energy Signup and view all the answers

What is the birthplace of stars known as?

Nebula Signup and view all the answers

When did our sun, as a star, form?

4.5 billion years ago Signup and view all the answers

_ _ start life in the same way but develop differently based on their size.

Stars Signup and view all the answers

_ _ pull clouds of gas and dust together causing them to collapse.

Gravity Signup and view all the answers

What is the primary factor that determines the evolutionary path of a star?

The star's mass Signup and view all the answers

Which of the following is NOT a necessary condition for star formation?

The occurrence of nuclear fusion reactions Signup and view all the answers

What is the primary source of the Sun's energy output?

Nuclear fusion reactions involving hydrogen and helium Signup and view all the answers

Which of the following best describes the initial stage of star formation?

The accumulation of interstellar gas and dust into molecular clouds Signup and view all the answers

What is the primary force responsible for the collapse of molecular clouds during star formation?

Gravitational force Signup and view all the answers

What is the term used to describe the thinly spread gas and dust in outer space from which stars are formed?

Interstellar medium (ISM) Signup and view all the answers