Star

What is the minimum mass for a star to attain & sustain core fusion?

• about 1/10 the mass of the Sun.

• about the mass of Jupiter.

• a little more than 1/2 the mass of the Sun.

• a bit less than the mass of all eight planets combined.

Tags

NGSS.HS-ESS1-1

How did the gas & dust between the stars & in all corners of the Universe get there?

• the result of planetary collisions & explosions

• by the gravitational attraction of supermassive black holes

• the Big Bang created it all

• the result of leftover remnants of previous stars

Tags

NGSS.HS-ESS1-2

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.

Proto-stars are also known as ____ for the constellation in which the first one was observed.

• neutron stars

• very hot fusion orbs

• T Tauri stars

• A Tari stars.

Tags

NGSS.HS-ESS1-3

T Tauri stars give off very little heat and are mostly ____ except for in the infrared.

• blue in color

• rare to find

• invisible

• yellow/white in color

Tags

NGSS.HS-PS4-3

Fusion at the core of a new star provides an outward force that does not balance gravity.

• True

• False

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

The Small & Large Magellanic Clouds are nearby (dwarf) galaxies which contain many new stars.

• True

• False

Tags

NGSS.HS-ESS1-3

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

• 50

• 50 million

• 50 billion

• 5 million

Tags

NGSS.HS-ESS1-1

The six stages of pre-main sequence star formation is described by

• the fusion of hydrogen into helium in the core.

• static equilibrium between gravity & the fusion process.

• astronomers who observe such phenomena.

• the Hayashi track.

The Sun and possibly the Alpha Centauri system may have formed

• as protostars in different galaxies.

• together in the same original star cluster.

• as an original quadruple star system before separating.

• billions of years apart but in the same cluster.