Stars and Galaxies

A spiral galaxy that has a diameter of about 120,000 light years.

• Ursa Major

• The Milky Way

• Messier 87

• Elliptical galaxy

A big explosion that happens to the red supergiant.

• Neutron star

• Supernova

• Nebula

• Black hole

A big cloud that contains dust, plasma, helium and hydrogen.

• Nebula

• Supernova

• White dwarf

• Neutron star

Hotter star appears to be what colour?

• Red

• Yellow

• Blue

• Green

Cooler stars appear to be what colour.

• Red

• Blue

• Yellow

• Green

What determines the colour of a star?

• It's size

• It's composition

• It's temperature

• They are all of the same colour

A star at the stage in its life cycle when it stops burning hydrogen, begins burning helium, and expands to a large, low-density star.

What stage in the life cycle does this describe?

• Supernova

• Black hole

• Red giant or Red supergiant

• Neutron star

Gravity pulls gases and dust particles in space toward one another, squeezing them into a smaller and smaller space. The temperature at the center rises high enough for nuclear fusion of hydrogen to begin.

What stage in a stars life cycle is this describing?

• The birth of a star

• Black hole

• The death of a star

• Nebula

Tags

NGSS.HS-ESS1-1

The brightest stars in the sky are Sirius and Rigel.

• TRUE

• FALSE

The solar system is situated at the edge of one of the spiral arms of The Milky Way galaxy.

• TRUE

• FALSE