Question

It's not physics it's physical science but I figured this was the closest subject to it. 1. The life cycle of a star begins with a cloud of gas and dust called a (1 point)

Answer 1

protoplanet.
constellation.
nebula.
protosun.
2. Which kind of star is most likely to spend the longest time on the main sequence? (1 point)
a low-mass red star
a yellow star like the sun
a high-mass blue star
a bright white star
3. Low-mass and medium-mass stars eventually (1 point)
grow into supergiants.
become supernovas.
become neutron stars.
turn into white dwarfs.
4. Which of the following determines how long a star remains on the main sequence? (1 point)
mass
temperature
brightness
all of the above

Answer 2

1. nebula
3. turn into white dwarfs
4. mass

Answer 3

1.nebula 2.low mass red star 3.white dwarf 4.of the above. just took the test.