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Carl Sagan's Contributions to Astronomy

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Questions and Answers

What process powers stars like the Sun?

Nuclear Fission

Chemical Reaction

Combustion

Nuclear Fusion (correct)

What determines the path to be followed by a particular star?

Distance from Earth

Age of the star

Mass of the star (correct)

Color of the star

What equation represents the conversion of mass into energy in stars?

Einstein's E=mc² (correct)

Newton's Law of Universal Gravitation

Bohr's Atomic Model

Heisenberg's Uncertainty Principle

How do stars release enough outward energy to counter gravity according to the text?

By undergoing nuclear fusion Signup and view all the answers

Which process involves two light nuclei merging to form a single heavier nucleus?

Nuclear Fusion Signup and view all the answers

What did Carl Sagan emphasize in his famous quote mentioned in the text?

The importance of understanding the universe Signup and view all the answers

What is the term for the creation of new atomic nuclei?

Nucleosynthesis Signup and view all the answers

Which of the following is a process of nuclear fusion in stars?

All of the above Signup and view all the answers

What is the term used to describe a very young star that is still gathering mass from its parent molecular cloud?

Protostar Signup and view all the answers

What is the primary fuel that most stars in the galaxy use to produce energy through nuclear fusion?

Hydrogen Signup and view all the answers

What is the final stage in the life cycle of a low-mass star?

Planetary nebula Signup and view all the answers

What is the term used to describe the process where a star's core shrinks and gets hotter, causing the outer layers to be pushed away from the core?

Red giant Signup and view all the answers