1.4 Nuclear Fusion - Notes Review

Which of these astronomical objects is the largest?

• a star

• a planet

• a spiral galaxy

• a solar system

The Sun most likely formed from a

• nebula

• galaxy

• supernova

• black hole

An astronomer is studying two stars that are the same distance from Earth. Star X appears brighter than Star Y. Which statement best explains this observation?

• Star X is larger than Star Y.

• Star Y is larger than Star X.

• Star X reflects the Sun’s light better than Star Y.

• Star Y reflects the Sun’s light better than Star X.

What happens when gravity compresses hydrogen atoms in a star?

• Hydrogen atoms fuse into heavier elements like helium.

• Hydrogen atoms break apart into smaller particles.

• Gravity causes hydrogen atoms to evaporate.

• Hydrogen atoms remain unchanged.

What is the goal of the Iron [26] game mentioned in your notes?

• To create one tile of Fe56 (iron-56).

• To destroy all hydrogen tiles.

• To prevent the star from dying.

• To combine as many tiles as possible without scoring.

What happens when two elements combine in the Iron [26] game?

• Mass is transformed into energy.

• The game ends immediately.

• The tiles disappear without any effect.

• The score decreases.

How does gravity affect the fusion process in stars?

• Gravity pulls elements closer, allowing faster fusion.

• Gravity pushes elements apart, slowing fusion.

• Gravity has no effect on the fusion process.

• Gravity only affects the temperature of the star.

What is the relationship between a star's mass and its gravitational pull?

• Greater mass results in stronger gravitational pull.

• Greater mass results in weaker gravitational pull.

• Mass and gravitational pull are unrelated.

• Gravitational pull decreases as mass increases.

What happens when a star reaches 'Game Over' in the Iron [26] game?

• The star has died.

• The star becomes a black hole.

• The star turns into a supernova.

• The star starts fusing hydrogen again.

How does the fusion process differ between a low-mass star and a high-mass star?

• High-mass stars fuse elements faster due to stronger gravity.

• Low-mass stars fuse elements faster due to weaker gravity.

• Both types of stars fuse elements at the same rate.

• High-mass stars do not undergo fusion.