Star Classification and Life Cycle

The lowest-mass stars cannot become giants because:

• they do not contain helium

• they rotate too slowly.

• their cores don't get hot enough

• they contain strong magnetic fields.

A planetary nebula is:

     

• the expelled outer layers of a medium mass star

• produced by a supernova explosion 

• a nebula within which planets are forming

• cloud of hot gas surrounding a planet

A white dwarf is composed of:

• Hydrogen

• Helium

• Carbon

• Iron

Tags

NGSS.HS-ESS1-3

All star formation begins with a/an:

• Nebula

• Planetary Nebula

• Protostar

• Nova

Tags

NGSS.HS-ESS1-3

If you trace the history of a carbon atom in your finger back through time to where it 

originated, where is it most likely to have come from?

• the Big Bang

• helium fusion in a red giant

• left over from Earth's formation

• splitting of magnesium atoms in a star's core

Tags

NGSS.HS-ESS1-3

When the inward force of gravity equals _________ a star is stable

• Outward Pressure

• Outward Gravity

• Inward Pressure

• Outward Friction

Nuclear fusion in a star's core stops when:

• the core collapses

• the core is made of oxygen

• the core is made of nickel

• the core is made of iron

Tags

NGSS.HS-ESS1-1

A main sequence star:

• fuses helium to carbon in its core

• fuses hydrogen to helium in its core

• fuses hydrogen to lithium

• fuses helium to beryllium in its core

Tags

NGSS.HS-ESS1-1

A main sequence star has a lifespan of:

• Millions of Years

• Trillions of Years

• Thousands of Years

• Billions of Years

Tags

NGSS.HS-ESS1-3

Gravity increases _____________ which produces enough heat to start fusion in a star.

• Friction

• Pressure

• Temperature

• Mass

Tags

NGSS.HS-ESS1-1