Earth and Space Science Final Exam

What percentage of the solar system's mass is contained in the Sun?

• About 74%

• About 99.8%

• About 50%

• About 25%

Tags

NGSS.MS-ESS1-3

What process do hydrogen atoms undergo in the Sun to get converted into helium atoms?

• Photosynthesis

• Nuclear fission

• Nuclear fusion

• Chemical reaction

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

What is the main sequence state of a star?

• The initial formation of a star from a nebula

• The state where a star burns energy and glows for billions of years

• The final stage where a star collapses to form a black hole or neutron star

• The stage where a star expands to become a red giant

Tags

NGSS.HS-ESS1-3

What happens when a star runs out of hydrogen?

• It collapses immediately

• It becomes a black hole

• It becomes a red giant

• It turns into a supernova

Tags

NGSS.HS-ESS1-3

What can larger stars create after a supernova?

• A new star

• A red giant

• A black hole or a neutron star

• A brown dwarf

Tags

NGSS.HS-ESS1-3

What is a brown dwarf?

• A star that has run out of hydrogen

• A star that is in the main sequence

• A star that never got large enough for nuclear fusion to start

• A star that has become a red giant

What is a white dwarf?

• A newly formed star.

• The remnants of the collapse of a red giant star.

• A galaxy consisting of billions of stars.

• A neutron star.

Tags

NGSS.HS-ESS1-3

What percentage of the universe is made up of dark matter?

• 68%

• 27%

• 50%

• 10%

Tags

NGSS.HS-ESS1-2

What is dark energy believed to do?

• It causes the universe to contract.

• It is a form of matter that can be seen with any type of instrument.

• It fills all space and is responsible for the universe's expansion.

• It is a theory that has been disproven by scientists.

What is the Milky Way?

• A barred spiral galaxy.

• A local group of stars.

• A spiral shaped galaxy estimated to be made up of around 300 billion stars.

• An elliptical mass of stars.