Star Formation and Properties

Stars are a large dense concentration of ​ (a)   gas.

Fusion (combining of hydrogen atoms ) in the core causes two hydrogen atoms to form ​ (b)   .

A ​ (c)   is a group of stars that form a pattern.

The ​ (d)   is an example of a constellation.

• hydrogen
• helium
• constellation
• Big Dipper

Tags

NGSS.MS-PS1-1

Which of the following is not a constellation

• 
• 
• 
• 

When two hydrogen atoms come together and create energy it is called

• Fission

• Nuclear meltdown

• Fusion

Tags

NGSS.HS-PS1-8

Star follow a definite ​ (a)   pattern that is referred to as the

​ (b)   of a star.

There is a graph called the ​ (c)   diagram which charts stars based on their temperature, ​ (d)   and mass.

• development/destruction
• life cycle
• Hetzprung-Russell
• luminosity , magnitude,

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Luminosity is a star's intrinsic (a)   (total energy emitted per second), while (b)   (apparent or absolute) measures how bright a star appears from (c)   , taking (d)   into account

• brightness
• magnitude
• Earth
• distance

A star forms from a spinning clouded of gas and dust called a ​ (a)  

As the Nebula spins, ​ (b)   causes it to ​ (c)   .

The spinning flattens into a disk of ​ (d)  

• Nebula.
• gravity
• dust and gas.
• shrink

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Reorder the following

• A star is formed

• Nebula is formed

• spinning cloud of dust and gas

• As the Nebula spins it flattens into a disk of dust and gas

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

As the material of a spinning Nebula comes together at the center of the disk,

A ​ (a)   begins to form.

A Protostar is the ​ (b)   of a Nebula that becomes a star.

As the Protostar shrinks, ​ (c)   build up.

When the temperature/pressure are high enough it starts to ​ (d)   and becomes a ​ (e)   .

• Protostar
• material in the center
• temperature and pressure
• give off light
• star

Tags

NGSS.HS-ESS1-1

Reorder the following from a Nebula - Protostar-star

• Material comes together in a Nebula

• A star is born

• Protostar shrinks building up temperature and pressure

• Protostar begins to form

• As temperature and pressure build up it gives off light and heat

The most ​ (a)   of stellar life is when it is in the ​ (b)   .

This is considered the ​ (c)   of the lifespan of a star, and it spends ​ (d)   in this stage. The ​ (e)   , our star is a main sequence star.

• stable phase
• Main-Sequence stage
• middle age
• most of its time
• sun

Tags

NGSS.HS-ESS1-1