42L: Galaxy Clip (first third) What do you see? What questions do you have?

Gravity and orbits phet

42 L: What do you see? What questions do you have? https://www.youtube.com/wat ch?v=aq4etCTg_WY&pbjreload= 10 https://www.youtube.com /watch?v=2I8PVoYY4mU

Gravity

GRavity and Orbits Basics Directions: Play with simulation and try to find the answer to the following questions: What do the blue and red arrows represent? Are the blue arrows always the same size or different? Which of Newton’s laws helps to explain the size comparison between the arrow coming from the Sun and the arrow coming from the moon? Turn gravity on and off...what happens/changes? Is gravity a force that pushes or pulls? Explain.

GRavity and Orbits Basics: Discussion Person A: What do the blue and red arrows represent? Person B: Are the blue arrows always the same size or different? Person A/B: Which of Newton’s laws helps to explain the size comparison between the arrow coming from the Sun and the arrow coming from the moon? Person A: Turn gravity on and off...what happens/Changes? Person B: Is gravity a force that pushes or pulls. Explain.

GRavity Notes (first third) An attractive force that pulls The force of attraction is always equal and opposite.

What can you do to increase or decrease the gravitational force What can you do to increase or decrease the gravitational force? (what makes the blue arrows get larger/smaller)

42 L What causes more or less gravity? 2nd third Increase Gravity: Decrease Gravity:

Patterns with gravity: Discuss with your groups any patterns you see that might be related to gravity Sentence Stem: When the surface gravity increases _____ will increase/decrease.

When Surface gravity increases on a planet . . .

42L/ R How does gravity affect our solar system? 3rd third When the gravity of a planet increases (due to _______) the planet is more likely to . . . Give evidence/data from the cards to prove your statement

Patterns with gravity: Discuss with your groups any patterns you see that might be related to gravity Sentence Stem: The planets closer to the Sun are affected by Sun’s gravity . . .

The closer the planet is to the sun. . .

42 l/R How does gravity affect our solar system? 3rd third When the gravity of a planet increases (due to mass) the planet is more likely to .. . Give evidence/data from the cards to prove your statement The closer the planets are to the Sun the ________ (MORE/LESS) the gravitational force (due to ___________________) affects planets . ..

Go back to gravity and orbits Go back to gravity and orbits...Find evidence to answer the following questions... Why would a planet with more mass have more moons? Why would a planet closer to the Sun have longer days than a planet further away?

CER- GRavity What two variables increase the gravitational attraction between two objects? Claim: (answer the question above) Sentence frame: The two variables that can increase gravity are . . . Evidence (variable 1 _______) Use at least 2 pieces of evidence... Possible sentence starter: In the card sort activity. . . In gravity and orbits . . . In the gravity demo clip . . Evidence (variable 2 ________) Use at least 2 pieces of evidence . .

42L/ R Gravity well: https://www.youtube.com/watch?v=MTY1Kj e0yLg DRAW WHAT THE GRAVITY WELL/DENT FOR THE EARTH MOON YOU MIGHT LOOK LIKE. What new idea does this demonstration show you about gravity? Moves fast enough or it will go towards weight Earth moon Sun earth moon 2luto and moon Clumping https://www.youtube.com/watch?v=6i6fnkvQHtk

42 L: What do you see? What questions do you have? https://www.youtube.com/wat ch?v=aq4etCTg_WY&pbjreload= 10 https://www.youtube.com /watch?v=2I8PVoYY4mU

What are gravitational waves? Why important: https://www.youtube.com/watch?v=4GbWfNHtHRg https://www.youtube.com/watch?v=HrduBZ319XI

ApplicatioN: Discuss- How does gravity help to explain. . . https://www.youtube.com/wat ch?v=aq4etCTg_WY&pbjreload= 10 https://www.youtube.com /watch?v=2I8PVoYY4mU

Exit ticket What was most challenging to you about today? What was the most confusing to you regarding material explored in class today? What questions arose today that you had not considered before?

If Absent .. . helpful clip https://www.youtube.com/watch?v=lY3XV_GGV0M Article: https://www.space.com/7050-gravity-space.html Gravitational waves discovered Sept 2017: https://www.youtube.com/watch?v=xb2MD_06ogY

Gravity is turned off here….

(Assuming each star has the same density)