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10 Questions

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Birth of the Sun

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Questions and Answers

How long ago was the sun born as a star in a nebula?

2.3 billion years ago

4.6 billion years ago (correct)

7.9 billion years ago

10.2 billion years ago

What is the sun's importance to life on Earth?

It is a precious gem in the sky

It is the source of energy for life on Earth (correct)

It is the only source of light during the day

It is the largest star in the universe

What was the common belief about the sun in ancient times?

It was made of ice

It was a solid object

It was a liquid ball

It was a burning ball of fire created by the gods (correct)

How many Earths could fit inside the sun?

Over one million Earths Signup and view all the answers

What kind of cloud did the sun originate from before it was born as a star?

Nebula Signup and view all the answers

What process takes place in the sun's core that allows it to be classified as a main-sequence star?

Nuclear fusion Signup and view all the answers

What will happen to Earth in about a billion years due to the sun's increasing energy levels?

Extreme greenhouse effect leading to water evaporation Signup and view all the answers

What will be the fate of Venus and Mercury when the sun reaches its red giant phase?

They will be engulfed by the expanding sun Signup and view all the answers

What is the end result of the sun's transformation during its red giant phase?

It collapses into a white dwarf Signup and view all the answers

What is the fate of the white dwarf as it cools down over time?

It will cool down until it reaches a few degrees above absolute zero Signup and view all the answers