8th Unit 5 Test Review 2024

A stars life cycle depends on their ...

• size

• temp

• color

• distance from earth

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

stars are mostly made of

• carbon and oxygen
• iron and nickel
• silicon and magnesium
• hydrogen and helium

Tags

NGSS.HS-ESS1-3

Stars are classified by these 3 things.

• Mass, distance, age
• Color, size, rotation
• Temperature, luminosity, size

• Density, composition, location

Stars the size of our sun go through the following life cycle: put them in order

• Main Sequence

• White dwarf then a black dwarf

• Red Giant then a Planetary Nebula

• Protostar

• Nebula

What is a nebula?

• A nebula is a cloud of gas and dust in space.
• A nebula is a black hole in space.
• A nebula is a type of star.
• A nebula is a planet in the solar system.

Tags

NGSS.HS-ESS1-3

What is a protostar?

• A protostar is an early stage in star formation gas and dust begins to clump together and heat up.

• A protostar is a later stagein star formation a type of black hole that absorbs light.

• A protostar in an early state in star formation it is a planet that orbits a star.

• A protostar is a later stage in star formation when it is fully formed star that emits light.

How does a protostar turn into a main sequence star?

• A protostar becomes a main sequence star when it cools down completely.
• A protostar turns into a main sequence star through gravitational collapse only.
• A protostar is transformed into a main sequence star by absorbing surrounding gas and dust.
• A protostar turns into a main sequence star when hydrogen fusion begins in its core.

Tags

NGSS.HS-ESS1-1

What does exothermic mean?

• A process that absorbs energy, typically as heat.
• A process that releases energy only in the form of light.
• A reaction that occurs without any energy change.
• A process that releases energy, typically as heat.

Tags

NGSS.HS-PS1-4

At what stage does a star spend most of its life?

• Main sequence stage
• White dwarf stage
• Protostar stage
• Red giant stage

What is the difference between a white and black dwarf star?

• White dwarfs are larger than black dwarfs.
• Black dwarfs are the initial stage of star formation.
• White dwarfs are hot remnants of stars, while black dwarfs are their cooled, dark counterparts.
• White dwarfs are formed from supernova explosions.