Stars and Their Life Cycle

Larger stars (stars with more mass) have a ______ life cycle than smaller stars.

Gravity is the force that causes dust particles to stick together in a nebula.

Stars use ______ as fuel.

• a. carbon

• b. oxygen

• c. hydrogen

• d. uranium

The color of a star is determined by its ______.

• a. size

• b. temperature

• c. composition

• d. distance from Earth

In the death of a massive star gravitational collapse is so complete that no energy or matter can escape. This is called a ______.

• a. neutron star

• b. black hole

• c. black dwarf

• d. supernova

Helium is the result of hydrogen atoms combining in nuclear ______.

• a. gravity

• b. fusion

• c. fission

• d. stellar harmony

Hotter stars appear to be ______.

• a. red

• b. blue

• c. yellow

• d. green

What is the densest type of star?

• a. main sequence star

• b. neutron star

• c. white dwarf star

• d. black dwarf star

What are three things that can be left behind after a star dies?

• a. planetary nebula, black hole, white dwarf

• b. red giant, white dwarf, black hole

• c. white dwarf, black hole, neutron star

• d. white hole, brown dwarf, asteroid

The very last stage in the evolution of a small star like our sun is a ______ dwarf.