Chapter 10 HW

How do stars form?

• through the sun
• when nebula collapses and nuclear fusion occurs
• through supernova
• Magic

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

• Helium
• Dust
• Hydrogen
• Iron

Which of the following would be classified as the beginning of star formation?

• red dwarf
• main sequence
• protostar
• white dwarf

The life cycle of a star depends on.

• mass

• luminosity

• radius

• temperature

At what point did our sun form? (What had to happen?)

• When Helium split into Hydrogen.
• When Nuclear Fusion of hydrogen into helium began
• When Nuclear Fission of hydrogen into helium began.
• When Nuclear Fusion of helium into hydrogen began

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

What is the first stage of the life cycle of a star for all stars?

• nebula
• protostar
• main-sequence
• red giant

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

• Nebula
• Protostar
• Main-sequence star
• Red giant

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

What is the biggest difference between a protostar and a main sequence star?

• Protostars are more massive than main sequence stars
• Protostars do not engage in nuclear fusion
• Stars spend far longer in the protostar phase than their main sequence
• Protostars are hotter than main sequence stars

Tags

NGSS.HS-ESS1-1

A stellar nebula is made up of...

• clouds of gas

• clouds of gas and dust

• stars

• planets

One of the factors that a large molecular cloud must overcome in order for gravitational contraction to begin is the thermal energy of the gas.​

• True

• False