Stars

What color of star is the hottest?

• Blue

• Red

• Yellow

• Orange

What is the name of the gas/dust clouds that form stars?

• Nebulas

• Protostars 

• Supernova

• Neutron Star

All stars begin their life in a

• Main Sequence

• Nebula

• Protostar

• Black Dwarf

At 10,000 degrees Celsius, hydrogen begins to change into helium and energy is released in a process called

• supernova

• pulsar

• nuclear fusion

• nuclear fission

Compared the the Sun, the star Betelgeuse is

• less luminous and warmer

• less luminous and cooler

• more luminous and warmer

• more luminous and cooler

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

• The death of a star

• Black Hole

• Stellar Nebula

A collection of gas and dust that can form a star is called a...

• Stellar Nebula.

• Planetary Nebula.

• Globular Cluster.

• Stellar Nursery.

What is the primary element that stars fuse early in their life cycle?

• Helium

• Dust

• Hydrogen

• Iron

This is a young star that glows as gravity brings it together

• Nebula

• Protostar

• Main-sequence star

• Red giant

Which nuclear process takes place in the core of stars, where hydrogen is joined to produce helium?

• fission

• fusion