Astronomy- Stars review

What causes clouds of dust and gas to form a protostar?

• magnetism

• gravitational attraction

• expansion of matter

• cosmic background radiation

The mass of a star can be determined by studying ____.

• the wavelength of light emitted by the star

• the color of the star

• the distance between the star and Earth

• binary star systems

Tags

NGSS.HS-PS2-1

A star is said to be born when _______________________.

• A protostar reaches a temperature high enough for nuclear fusion to begin.

• A red giant collapses on itself and becomes a black hole.

• Pressure within a protostar becomes so great that a supernova occurs.

• A dark, cool interstellar cloud begins to contract.

Which property primarily determines whether a giant star or super giant star will form?

• Mass

• Color

• Shape

• Composition

Massive stars terminate in a brilliant explosion called a _________.

• Red giant

• Supernova

• White dwarf

• Protostar

• Neutron star

The final stage in the life cycles of the most massive stars is a

• Black hole

• Black dwarf

• Supergiant

• White dwarf

All stars, regardless of size eventually ___________.

• Run out of fuel and collapse

• Become neutron stars

• Become black holes

• Turn into black dwarfs

• Explode

Tags

NGSS.HS-ESS1-1

Which of the following does not affect the apparent brightness of a star?

• How old the star is

• How big the star is

• How hot the star is

• How far away the star is

What is the x axis variable on an hr diagram

• Temperature

• Kelvin

• Absolute Brightness

• Apparent brightness

About 90 percent of stars on the HR diagram are

• Supergiants

• Main-sequence stars

• White dwarfs

• Black holes