7+SCIENCE

April 25, 2012

Start on Page 5, do worksheet on Page 8

[|Compound machines] April 18, 2012

[|Deepsea Challenger]

[|sperm whales]

[|balancing birds]

March 30, 2012

In-class assignment - pair off into groups of three. Go on a scavenger hunt on the web and make a collage. Find pictures that demonstrate the principles of physics that we studied this quarter - it could be Newton's second law, Hooke's Law, gravity, friction, momentum, energy, work, power, acceleration, velocity...or any other topic related to our physics studies that you like. Put them into a Powerpoint slide. Time permitting, we'll put them up on the board and have you explain your choices. Take 20 minutes to construct your collage.

March 29, 2012

Here is the problem set - if you complete this satisfactorily by class on Friday, I will drop your lowest homework/classwork grade.

March 19, 2012

What is the gravitation potential energy of a girl who has a mass of 40 kg and is standing on the edge of a diving board that is 5 meters above the water?

[|Kinetic vs. potential energy] [|the small man and the giant]

How much work is done if a person lifts a barbell weighing 450N to a height of 2m? What do you know – force and distance What do you need to find out – work

March 14, 2012

[|Skating and biking]

March 9, 2012

Due by class MONDAY - your half page of research on different types of energy. Use the internet (but don't copy!) to discuss all the different types of energy you find.

If you finish the test early, work on this project.

For class Friday the 17th!

Newton's Car Lab introductory write-up Turned in BEFORE Friday's class: Aim Question Hypotheses (identify variables) Materials and Methods

I want your question and hypotheses to identify how you are testing Newton's Laws of Motion

And BRING in MATERIALS - styrofoam, aluminum foil, different straws, whatever you think will help your car

February 13, 2012 We'll be going over the rubber band lab today, going over the in-class worksheet from Friday on Newton's Laws and Hooke's Law, and then moving on to work and energy....if we have time we'll get to the video below: [|Fossil fuels video]

February 8, 2012

To be turned in BEFORE class on FRIDAY, Feb.10: Your rubber band lab write-up: Aim Question Hypothesis Materials and Methods Observations/results Discussion Conclusion (with an "Improvement" section - how would you improve the method, and what questions would you ask in the future?)

Remember! For the Observations/Results section, you are plotting force (Newtons) on the X-axis (your independent variable) vs. distance stretched (meters) on the Y-axis (your dependent variable). Including plots for each of the rubber bands you tested, and show the data in a table. This should be 4 plots, and either 1 big table or 4 small tables.

Can you calculate the "k" in F=kx from your data? Try to calculate the "k" for each of the rubber bands you tested. Remember, if F=kx, then k=F/x (so the units for k will be Newtons/meter).

You will turn this in by class on Friday.

February 6, 2012

Just to reiterate what I said in class: by the start of Wednesday class, you need to upload to Turnitin, in one document, for the Rubber Band Experiment:

-Your Question (what are you trying to answer by testing rubber band stretching? Think Hooke's Law...) -Your hypothesis, stating the independent and dependent variables -Your materials and methods - how are you going to go about testing your hypothesis (this should list *all* of the materials you plan to use, and describe in detail the method you will follow in testing your hypothesis)

This should be a Word document, with three separate headings.

February 3, 2012 I posted lots of stuff today, so be sure to read all the way down.

__Homework__ (DUE BEFORE CLASS MONDAY, Feb. 6) 3 things I want you to do. 1) Everyone go home and research Hooke’s Law. In what sorts of activities is it used? Talk about practical applications of Hooke’s Law….what can you find out? Use the internet freely, and see what you can learn. BEFORE class on Monday upload the paragraph in to Turnitin.

2) Finish your observations from class today on Hooke's law. You wrote down your hypotheses in class, and now make sure you finish writing your observations and results by CLASS ON MONDAY. Upload to Turnitin.

3) Make sure you’ve read pp. 598-605 in the online textbook (green).

Also - bring to class any materials you would like to test the elastic limit of. Rubber bands? Pieces of wire? Hair (if you can find some, maybe on your brush or comb)? It would be great if some of the ladies could bring in hair.

If you have any questions on the quiz that was passed back today, come up and ask me at any time.

For Monday's class, we'll be watching this video: [|Hooke's Law]

January 30, 2012

Did you read pp. 588-600?

By Wednesday, read through page 605.

Fun game for class: Can you identify what forces are at work here? http://pbskids.org/dragonflytv/games/game_space_station.html

Homework #3: (a) Explain what happens when a runner takes off from the starting line, using Newton's 2nd and 3rd laws of motion. Hint - feet are pushing against the earth....Identify the force pairs at work here. (b) Now - what happens when an apple falls from the tree - what forces are at work here?

January 27, 2012

Check out this picture:

What's happpening?


 * Homework for the weekend -** read pp. **588-600** of the Green Level Holt Science and Technology online text. You should all have a password. If you have any trouble getting into it, please contact me.

January 25, 2012

Starter question for Wednesday morning: **What would happen if we stopped using motor oil? Why?**

Second homework (remember both #1 and #2 are due TOMORROW by 7 p.m.). It's not too long. [|HW#2 Forces.docx]

January 23, 2012

A few simple problems for homework #1. [|7G Homework 1.docx]