Feb 27 & 28 Homework Due

Read & Study Ch. 12. Write 5 things you learned and 5 questions you have

Tonight’s HW

Read & Study 12.1-12.4; do #1-7 p. 180 **Grade will be worth 5 points; ½ point per question and 1.5 points given to a randomly selected problem the teacher will grade on CORRECTNESS. Write full Q&A or include the Question in your Answer!**

Do Now Take a clicker… 5 minutes to find your Energy poster and decide if you want to…- Take it home- Throw it out- Or hang it up

o If you wish to display your poster in the class, please borrow masking tape from Ms. Bones and display it NEATLY in the room in a place that does not cause a safety hazard or disrupt normal student learning!

o If you need to borrow tape/glue to repair any parts of your poster that may have been damaged due to group work, please see teacher.

In your notes…• Reflect on this poem by Francis Thompson:

All thingsby immortal powernear or farto each otherhiddenly linked are.That thou cans't not stir a flowerwithout troubling a star.

• What do you think this means? Interpret the poem in your own words by writing your thoughts in your notes.

Gravity…• Is difficult to measure in everyday life• Is something we take for granted• Is the one of the 4 fundamental forces :• gravity, • electro-magnetism, • strong nuclear forces (which hold the nucleus

together)• weak nuclear forces (involved with radioactive

decay weak nuclear forces: are involved with carbon dating, are a source of radioactivity, etc..)

Which is the WEAKEST of the 4 forces?

1 2 3 4

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1. Strong Nuclear Force

2. Weak Nuclear Force

3. Electromagnetic Force

4. Gravity

Countdown

10

TRUE or FALSE: The Moon has no gravity.

1 2 3 4

0% 0%0%0%

1. True2. False3. Not enough

information to say

4. I’m not really sure

Countdown

10

TRUE or FALSE: Planets with thin atmospheres have little gravity

1 2 3 4

0% 0%0%0%

1. True2. False3. Not enough

information to say

4. I’m not really sure

Countdown

10

TRUE or FALSE: Planets distant from the Sun have less gravity than Earth

1 2 3 4

0% 0%0%0%

1. True2. False3. Not enough

information to say

4. I’m not really sure

Countdown

10

TRUE or FALSE: Space shuttle astronauts are weightless because there is no gravity above Earth

1 2 3 4

0% 0%0%0%

1. True2. False3. Not enough

information to say

4. I’m not really sure

Countdown

10

Google… • PHET Gravity and orbits• Click the first link• Run the simulation and complete the Lab

Activity Sheet. This is due next class for a grade – you will have about 20-30 minutes next class to finish working on this (10 points based on completion)

• There will also be a graded, individual, 30 point POST LAB next class to assess this lab activity.

Action: Earth pulls moon. - What is the reaction?

- What is stronger – action, reaction, or same?

- What Law defends your answer?

Action: Earth pulls moon.

What is stronger – action, reaction, or same?

1 2 3

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1. Action(Earth pulls moon)

2. Reaction (moon pulls Earth)

3. Same!

What law defends your answer?

1 2 3

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1. 1st Law2. 2nd Law3. 3rd Law

Choose the picture you think shows the gravity forces on the Earth and the Sun.

A. B. C. D. E.

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A. B. C. D. E.

How would these gravity forces change if the Sun got more

massive?

A. B. C.

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A. Increase

B. Decrease

C. Stay the same

How would these gravity forces change if the Earth was much

closer to the Sun?

A. B. C.

0% 0%0%

A. Increase

B. Decrease

C. Stay the same

How would these gravity forces change if the Earth got much less

massive?

A. B. C.

0% 0%0%

A. Increase

B. Decrease

C. Stay the same

How would these gravity forces change if the Earth and Sun were

moved farther apart?

A. B. C.

0% 0%0%

A. Increase

B. Decrease

C. Stay the same

Choose the picture of how the Earth would move if you “turned off” the

gravity forces.

A. B. C. D. E.

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A. B. C. D. E.