Quiz#3 geoscience nearpods 5-8

What is true of a stars color and size?

• our sun is a yellow dwarf

• our sun has middle size and temperature compared to the rest of the universe

• red color stars are twice as hot as the sun

• Rigel is the largest star

what 3 characteristics of the sun make it the center of our solar system?

• fiery

• gravitational pull

• magnetic field

• its orbit

• its smaller size compared to other suns

what phase of matter is the sun in when it is in main sequence?

• solid

• liquid

• gas

• plasma

what are true of the elements contained in the sun?

• it is 91 percent Hydrogen and 8.9 percent helium

• isotopes of helium take part in fission

• other elements are oxygen,carbon, iron and neon

• Fusion is created from the separation of Hydrogen nuclei

What happens immediately after our sun runs out of Energy?

• it collapses to a white dwarf

• it expands to a red giant

• it will have a supernova explosion and create a black hole

• it turns into a yellow dwarf

Define nuclear fusion.

• Nuclear fusion – combining lighter atoms to make heavier ones – is what makes it possible.

• Nuclear fusion – splitting lighter atoms to make heavier ones – is what makes it possible.

• Nuclear fusion – combining heavier atoms to make lighter ones – is what makes it possible.

• Nuclear fusion – splitting heavier atoms to make lighter ones – is what makes it possible.

Tags

NGSS.HS-PS1-8

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

When hydrogen is "fused" together on the Sun, what new element is created?

• Helium

• Carbon Dioxide

• Oxygen

• Light

Tags

NGSS.HS-PS1-8

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

What is true of the formation of stars

• a nebula is a large cloud of dust and gasses in space

• low mass stars have long lives

• hi mass stars have long lives

• a protostar i the beginning of nuclear fusion

• our sun is a main sequence star

what is true of the difference between low mass and hi mass stars?

• low mass stars will become red giants which spread into outer space

• low mass star will cool eventually to become a white dwarf

• hi mass star turns into a red super giant

• a low mass star will possibly supernova or become a black hole

An atom's atomic number is equal to

• The number of protons in the atom's nucleus

• The number of neutrons in the atom's nucleus

• The number of electrons in the atom

• The total of protons + neutrons