Begin Electricity Unit

We finished up the Gravity unit with a black hole video.  We were supposed to take a quiz but ran out of time.  I assigned the practice quiz as homework.  We started the electricity unit with the Sticky Tape Lab.

HW:  Finish question 14 on Lab; practice quiz; ws 1 (read pp. 478-488 if you need extra help); assemble HW packet

Orbits and Gravity Homework Packet

Planetary Motion Notes (50)
Chapter 11 Review Questions (100)
Chapter 12 Review Questions (100)
Worksheet 11-1 (50)
Worksheet 12-1 (100)
Demos and Mini-labs (100)
Black Hole Video Q's (100)

More Gravity

I checked the two sets of book problems, but we did not have time to discuss them.  I also checked the Satellite Motion Worksheet (WS 12-1) and we went over the answers on the back side in class.  There will be a quiz on these concepts on Tuesday.  We made a model of a moon orbiting a planet and saw that each object pulls on the other and influences the motion of the other.  This can generate a star wobble, a key indicator of extrasolar planets.

We continued to discuss Newton's equation for universal gravitation and calculated the mass of the Earth, the gravitational attraction between 2 students and the field strength for asteroid on the cover of the book The Little Prince.  I also introduced the concept of field strength and field lines.  The field lines for earth extend infinitely into space, but their spacing gets further apart, indicating that the field strength is decreasing.  We calculated the gravitational field strength for the space shuttle orbiting at a height of 200 km above the earth.  We also did some demo's and mini-experiments that have to do with weightlessness.

HW:  Study for quiz on ws 12-1

More Planetary Motion

We continued our discussion of Planetary Motion with a discussion on circular and elliptical orbits and the forces, energies and velocities involved for a planet at various positions through its orbit.

HW:  Read chapter 11;   Review Questions 1-20; Finish worksheet 11-1 and 12-1

Planetary Motion

We started a mini-unit on planetary motion. I discussed the history of planetary motion, including Aristotle, Ptolemy, Copernicus, Gailieo, Brahe and Kepler.  We did a short activity drawing ellipses.

HW:  Read chapter 12; review questions 1-15

Unit IV Test

Today I collected the homework packet and gave the Unit IV test.

Prepare for Energy/Heat/Momentum Test

We spent most of the period going over the review sheet.  The complete answers can be found here.  Also, answers to Worksheet 4 are available here.

HW:  Assemble HW Packet; study for test

Energy and Momentum Homework Packet

Worksheet 1
Worksheet 2a
Worksheet 2b
Roller Coaster Problem
Worksheet 3
Worksheet 4
Worksheet 4 (yellow)
Chapter Review p. 308 #3-18
Chapter Review p. 85 #1-19
Worksheet 7-1
Hot Water Lab
Flame Test Lab
Collision Computer simulation (pink)-new!
Unit IV Review -new!
Quiz 2
Quiz 3
Quiz 4
Quiz 5
Quiz 6
Momentum Quiz #1

Please attach a note indicating if you do not have quizzes because they were not passed back to you.