Test Monday

Hope your other tests today went well and you were able to focus on them since I moved the exam to Monday.
Notes from today
Jeopardy - type slideshow for some of the energy unit
TGT game questions
TGT game answers
Chapter 6 reading guide

Plus other review stuff (see older posts)

Stopping Distances, Work = F*d = Change in E

Exam Friday!  Energy, Work, Power, Chapters 5 & 6  See yesterday's post for review ideas.  more review here 

In class today, students were asked to predict how far a car would take to stop if they were traveling at 70 mph and needed to stop suddenly to avoid an accident.  They have a small piece of paper with their name and a tiny piece of tape on it; they are asked to walk down the hall and place the paper on the wall where their prediction is.  

We then return to class and do calculations; converting mph to meters per second, figuring out how reaction time plays a part, and then how Work (force times distance) is done by the brakes to dissipate Kinetic Energy (and convert it to thermal energy).  

Once we have a distance, there are often arguments; we’ll look up some of the BEST cars’ stopping distances to verify that our numbers are right, then go back to the hallway and count it out – all the kids are usually way off (underestimating) and the closest guess gets bonus points.  We discuss how changing velocity relates to this (slower and faster) and how increasing speed significantly increases stopping distance (and risk of injury).

I make sure all the papers are collected and then we return to class; discussing the significance of this and time when not being attentive (TEXTING!) to the road on stopping distance and safety, and that in the real world, we have other issues (non-perfect brakes, slope of road, less friction due to wet/snow, non anti-lock brakes, etc.)

Tomorrow we'll do some WORK  (Force * distance)  :)  with machines and have some notes to write regarding work, power, and efficiency.

Exam Friday! Hmwk due Tues.

Exam Friday!  Recommended review:  chapter reviews in textbook from 5 and 6 (focus on power and efficiency in chapter 6) - answers in teacher's edition available to anyone, anytime, in my room.

Today we continued discussing respiration (opposite of Photosynthesis) in the context of energy in our bodies.  The worksheet from last week (get a copy here) is due tomorrow.
The concept of how we lose weight (breathe in O2, breathe out CO2) was a fun surprise to some classes and led to lively discussion.
Classes also had a review (kind of like a quiz, but it's just for 4 pts) on Energy - our A+ Objective #3 assessment, and then problems to work on the back side.
These worksheets were graded (the front side) and the back side is recommended - I will give answers in class tomorrow (Tues.)

Tuesday we'll also take on a fun endeavor; determining stopping distance for a car moving at various speeds.  We know everything necessary to undertake this task, and we'll have bonus points for the best guesser vs. our theoretical measurement in each class.

Wednesday will be more use of the idea of Work:  Force * distance   and we'll apply the idea of work and conservation of energy to simple machines in some fun demonstrations.  Efficiency will be discussed afterward, as nothing is actually 100% efficient or ideal (without thermal E taking some energy away) - no such thing as a perpetual motion machine!

Thursday we will finish video(s) on car crashes, discuss, and have some notes/demonstrations on E transfer (mainly dealing with Thermal E)

Meet in Library Monday (probably Tuesday)

Due to roofing work, my class will be closed - probably until after Thanksgiving.
I apologize for not updating online this week; it was crazy outside of class for me.

Homework was assigned on Wednesday for today; it was p. 156 and 158 - practice problems.

Grades should be re-posted this weekend, and one more optional assignment (about vehicle safety) will be available sometime early next week.

Today we did more GPE - KE practice, I handed out a practice worksheet and objectives for this unit.
Answers for the practice worksheet:

Notes on Work this week

Our exam will likely be Wednesday after Thanksgiving break (the 28th).

Another optional assignment, HMWK for Tuesday

https://docs.google.com/document/d/1BMxbm6Kt-R48sXlbKSFA3ZPkHDfpCyrBthYRdth-fZo/edit
New optional assignment (Above)  Due Friday, the 23rd of November, by midnight.

Also HMWK for Tuesday:  p. 880#46-52

Today we tried a ranking task on KE (and GPE), finished notes on Chemical potential Energy, and discussed answers to the homework that was turned in today.  Monday we'll revisit GPE - KE conversions, Internal (Thermal) energy, and work with the KE equation / relationship to Work.

New Optional Assign, HMWK for Thursday, Notes

New optional assignment:
https://docs.google.com/document/d/1037EfDveXIHb0UxPQ78Q1sHeHFzGbjnsr9VnfCIiRCE/edit
Due by Nov. 23, midnight.

HMWK for this Friday:
Read p. 135-143
p. 143#1-6

Notes from Monday:
https://docs.google.com/presentation/d/1zPtc-w2pmXORyPqvdANeOT7OSet32u7zJJvR0BCQ5M4/edit


Last Friday's homework that was turned in today:  Read p. 128-133, and p. 133#1-7

Lat minute review

Question and answer game