Question

1. which element is most abundant in the universe?

a. oxygen
b. hydrogen
c. carbon
d. iron
answer:

part 2: matching
match the star type or stage to its description.
descriptions:
a. main sequence star
b. white dwarf
c. red giant
d. supernova
e. neutron star
f. protostar
terms:

1. our sun currently is a...
2. a star that has collapsed and no longer undergoes fusion
3. a late stage in a medium star’s life
4. a massive explosion ending a large star’s life
5. a dense remnant of a supernova
6. a forming star before nuclear fusion begins

part 3: short answer

1. what are the two main elements found in stars?

Explanation:

1. Hydrogen is the most abundant element in the universe due to its simplicity and role in the Big - Bang nucleosynthesis and stellar fusion processes.
2. The Sun is a main - sequence star, fusing hydrogen into helium.
3. A white dwarf is a collapsed star that has exhausted its nuclear fuel and no longer undergoes fusion.
4. A red giant is a late - stage in a medium - sized star's life.
5. A supernova is a massive explosion that marks the end of a large star's life.
6. A neutron star is a dense remnant left behind after a supernova.
7. A protostar is a forming star before nuclear fusion begins.
8. Stars are mainly composed of hydrogen and helium, with hydrogen being the fuel for nuclear fusion and helium being the product of early - stage fusion processes.

Answer:

1. 5. B. Hydrogen
2. 1. A. Main sequence star
3. 2. B. White dwarf
4. 3. C. Red giant
5. 4. D. Supernova
6. 5. E. Neutron star
7. 6. F. Protostar
8. 7. Hydrogen and Helium