Stars
What happens first when a star begins to run out of fuel? The star's core shrinks. The star becomes a black hole. The star becomes a white dwarf. The star's outer layer drifts away.
a
What is the initial stage of all stars? nebula black hole supernova white dwarf
a
Some objects in space are created from clouds of gas and dust. What will happen if the cloud does not have enough mass? A core will form. A star will not form. A protostar will form. A nebula will not form.
b
What causes a star to shine brightly? the color that is produced the energy that is released the amount of gravity that is present the types of elements that are present
b
What is the main element that stars are made of? helium hydrogen magnesium sodium
b
Which object is created during the formation of a star? a nebula a protostar a supergiant a supernova
b
Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star
d
How is the Sun classified? as a giant star as a medium star as a white dwarf as a neutron star
not a
Which factor causes gas and dust to pull together during the first stage of star formation? density gravity heat pressure
not a
Which event takes place first in the stages before the birth of a star? Gravity pulls gas and dust together. A protostar forms as mass increases. Nuclear fusion begins under high pressure. A protostar collapses and becomes denser.
not c
