PS - Stellar Formation

What is the term used for the clouds that form new stars?

• Stellar nebula

• Main sequence

• Protostar

• Red dwarf

What element is present in the earliest era of star formation?

What stage of star formation is defined as nucleus of heavy hydrogen?

Which of the following elements is heavier than iron?

• Gold

• Hydrogen

• Helium

• Carbon

As the outer layers expand, they cool and thus become more and more red, and the star become of what we called the red _____ star.

How many proton and neutron does a helium have?

• 1 proton

  1 neutron

• 2 protons

  1 neutron

• 2 protons

  2 neutrons

• 1 proton

  2 neutrons

What will happen when all the hydrogen is almost gone?

• The core will get smaller and colder.

• The core will get bigger and colder.

• The core will get bigger and hotter.

• The core will get smaller and hotter.

In the phase called ______ flash, things are so hot that the stars are able to fuse heavier helium nuclei into larger nuclei like carbon and oxygen.

In the phase called ______ flash, things are so hot that the stars are able to fuse heavier helium nuclei into larger nuclei like carbon and oxygen.

Which of the following elements is the heaviest?

• Oxygen

• Neon

• Silicon

• Iron