Question

2. which of the following happens when a low - mass star runs out of fuel? choose all that apply . ( 3 points )

A its core becomes a white dwarf

b its outer layers form a nebula , or a vast cloud of gas and dust

c its outer layer expand , and the star becomes a red giant

d gas and dust in a nebula contract to form a protostar

Answer 1

3. which if the following factors determines how long a star will live ? ( 1point )

A . star’s color

b. the star’s mass

c. the star’s diameter

d. the star’s distance from the sun


4 . which of the following causes constellations to appear to move throughout the night sky ? (1point)

A . the earth’s rotation

b. the earth’s revolution around the sun

c. the stars’ apparent brightness

d . the stars’ absolute brightness


5. which of the following famous constellations is known as orion’s dog ? (1point )

A canid major

b. scorpius

c. taurus

d. cygnus