9/27 Stars Lives and Gravity

​Do Now: Google Classroom Digital worksheet

​https://classroom.google.com/c/NjIxMjM1ODEzMTQ4/a/NjI1OTk1OTQyODE5/details

Multiple Choice

1. Compared to the sun a white dwarf star is

2. 
   

• 1. hotter and larger

• 1. hotter and smaller

• 1. cooler and larger

• 1. cooler and smaller

Multiple Choice

According to the chart, the Sun is classified as

• 1. a main sequence star with a temperature of approximately 4,000*C and a luminosity of 100

• 1. a main sequence star with a temperature of approximately 6,000*C and a luminosity of 1

• 1. a white dwarf star with a temperature of approximately 10,000*C and a luminosity of 0.01

• 1. blue supergiant star with a temperature of approximately 20,000*C and a luminosity of 700,000

Multiple Choice

Which sequence of stars is listed in order of increasing luminosity?

• 1. Spica, Rigel, Deneb, Betelgeuse

• 1. Polaris, Deneb, 40 Eridani B, Proxima Centauri

• 1. Barnard’s Star, Alpha Centauri, Rigel, Spica

• 1. Procyon B, Sun, Sirius, Betelgeuse

Multiple Choice

1. Compared to the luminosity and surface temperature of a red main sequence stars, blue giants are

• 1. less luminous and have a lower surface temperature

• 1. less luminous and have a higher surface temperature

• 1. more luminous and have a lower surface temperature

• more luminous and have a larger surface temperature

Multiple Choice

1. The Sun appears larger than other stars because of its

• 1. yellow color

• 1. high temperature

• 1. distance from Earth

• 1. chemical composition

Fill in the Blank

What is the main property that determines the life cycle of a star?

Open Ended

What kind of stars live the longest and most stable lives? Are their observable properties that allow us to identify these stars?

​https://phet.colorado.edu/sims/html/gravity-force-lab/latest/gravity-force-lab_all.html

​https://classroom.google.com/c/NjIxMjM1ODEzMTQ4/a/NjI1OTk1OTQyODE5/details

​https://phet.colorado.edu/sims/html/gravity-force-lab/latest/gravity-force-lab_all.html

​https://classroom.google.com/c/NjIxMjM1ODEzMTQ4/a/NjI1OTk1OTQyODE5/details

Dropdown

True or False: The more mass an object is, the smaller the force of gravity

​

Select answer

Dropdown

True or False: As one object gets closer to another object, the force of gravity will increase.

​

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Dropdown

Fill in the blank: An object with more mass has ​

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gravitational force than an object with a smaller mass.

Dropdown

Fill in the blank: Objects that are closer together have ​

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of a gravitational force between them than objects that are further apart

Reorder

1. Rank these diagrams of two planets from strongest gravitational force (1) to weakest gravitational force (4)

• B

• C

• D

• A

1

2

3

4

• 1
• 2
• 3
• 4

​https://dimit.me/Fe26/