Question

multiple choice questions

1. which process occurs in the suns core to release energy as radiation?

+1
a. chemical combustion
b. nuclear fission
c. nuclear fusion
d. radioactive decay

1. what model do scientists use to illustrate the stages of life for a star like our sun?

+1
a. the rock cycle
b. stellar life span model
c. tectonic plate model
d. the water cycle

1. which of the following is used as evidence to describe the suns current stage of life?

a. lunar eclipses
b. atmospheric pressure on earth
c. evidence of nuclear fusion and energy output
d. the number of planets in the solar system

1. according to the big bang theory, how did the universe begin?

+1
a. it has always existed in its current state.
b. it began as a single, dense point and has been expanding ever since.
c. it was created by the collision of two galaxies.
d. it formed from the cooling of a single giant star.

Explanation:

1. The sun's core releases energy by fusing hydrogen into helium, which is nuclear fusion.
2. The model tracking star life stages is the stellar life span model.
3. The sun's current main sequence stage is confirmed by its ongoing nuclear fusion and stable energy output.
4. The Big Bang Theory states the universe started as a dense, hot point that expanded over time.

Answer:

1. C. Nuclear fusion
2. B. Stellar life span model
3. C. Evidence of nuclear fusion and energy output
4. B. It began as a single, dense point and has been expanding ever since.