life cycle of stars part one

Stars are formed from big clouds of gas and dust is known as:

• dust cloud

• space fog

• neutron clouds

• nebula

The only force acting on the nebulae is:

• thermal expansion

• singularities

• gravity

• microscopic adhesion

Tags

NGSS.HS-PS2-4

A star is born when:

• nuclear fusion starts

• a nebula becomes a protostar

• gases in a nebula condense

• hydrogen is used up in fusion processes

Tags

NGSS.HS-ESS1-1

Vast areas filled with very cold gas & dust between stars is known as

• one big empty area in space.

• "cosmic fluff."

• the interstellar medium.

• the interstellar void.

The interstellar medium & nebula clouds are important because

• the Big Bang would've never occurred without them.

• black holes would never exist if the clouds were not there.

• they make up the space between the stars.

• they are regions for new star formation.

What causes the interstellar clouds to collapse to form proto-stars & stars?

• centripetal forces that act over large areas between stars

• a contraction & clumping of gas/dust due to gravity

• a contraction & clumping of gas/dust due to frictional force

• a "trigger" mechanism such as two colliding stars

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

The interstellar medium is an area that is packed with dense clouds of star-forming material.

• True

• False

Tags

NGSS.HS-ESS1-3

Average-size stars like our Sun take about ___ years to form from a nebula cloud.

• 100

• 10 million

• 10 billion

• 1 million

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

In this stage, a star spends most of its life. Hydrogen is fused into helium at a temperature of millions of degrees.

• nebula
• protostar
• main-sequence
• supergiant

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3