Daily Agenda Ms. DeSalvo November 7, 2013 Period 1: 7:20 - 7:53 Period 2: 7:59 - 8:31 Period 3: 8:37 - 9:09 Period 4: 9:15 - 9:47 Period 5: 9:53 - 10:25 Period 6: 10:31 - 11:03 Period 7: 11:09 - 11:41 Period 8: 11:47 - 12:20 Ms. DeSalvo November 7, 2013

CPS Bell Ringer 11/7/13 Activity: A slinky, a slinky… Can you name a tool that is used for measuring force?

CPS (Period 6,8) November 7, 2013 Measuring Force Today Last Class Period 6: 10:31 - 11:03 Period 8: 11:47 - 12:20 Today Measuring Force Newton’s 3rd Law Intro to Spring Scales Spring scale demos Last Class (See me for missed work) Forces Notes Inertia Stations Homework 2.1 Newton’s 1st Law of Motion

CPS Bell Ringer 11/7/13 No Bell Ringer Today!

What is a Force? A push or a pull

How do we measure a force? Spring Scale Measured in Newtons (N) Pull to: 1 N 4 N 6 N 8N 10 N

Link 2 Spring Scales Together and Read the spring scale Link to a stationary object (your desk) and pull Both partners pull to 3 N One partner pull, one partner hold Link together, both partners pull and walk at a constant speed Link together, both partners pull and accelerate your walk Conclusion: Force is the same when two objects interact on one another

Force Q: Can there be a force only on the puck and not on the string? No, always need two objects Between two objects A push or a pull that causes an acceleration or a change Force

Newton’s 3rd Law of Motion Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first. For every action there is an equal and opposite reaction Action-reaction Force Pairs

Action-Reaction Forces come in pairs Action: If you push on a table with 10 N Reaction: the table pushes back on you with 10 N In the opposite direction

Example #1 Action: A baseball pushes a glove to the left with 8 N. What is the reaction force? Reaction: A glove pushes a baseball to the right with 8 N.

Example: Newton’s 3rd Law Ex: Bird uses its wings to fly. Action: Wings push air downwards with 10 N Reaction: Air pushes the bird upwards with 10 N Equal Force in opposite directions

Example: Newton’s 3rd Law Ex: Interaction between a baseball and bat Action: Baseball forces the bat to the left at 12 N Reaction: The bat forces the ball to the right 12 N Action-reaction Force Pairs

Example: Newton’s 3rd Law Ex: Interaction between tires on car and road Equal Force in opposite directions Action-reaction Force Pairs For every action there is: an equal (in size) & opposite (in direction) reaction

Example: Newton’s 3rd Law Ex: Interaction between ball and Earth Action: Earth pulls down on ball Reaction: Ball pulls up on Earth Equal Force in opposite directions

BIO Bell Ringer 11/7/13 Activity: What is energy? What is the scientific definition of energy? What is an ecosystem?

Biology (Period 2,3,4) November , 2013 Period 2: 7:59 - 8:31 Period 3: 8:37 - 9:09 Period 4: 9:15 - 9:47 Today Ipads – Ecological Foot Print Quiz Do not change any setting on the ipad, do not use it for anything except what you are directed to do. Last Class (See me for missed work) Test Today! Please be seated. Get out your study guide. Get out a pen or pencil and wait quietly for directions.

Ecological Foot Print Quiz Turn the Ipad on Go to settings Click WIFI Choose “308.1x” When prompted, enter your student username and password. (The one you would use to log on to a school computer.) Once you are on the network, go to Safari. Search “Ecological Footprint” and go to the quiz. Begin the quiz, answer the questions the best you can. Make approximations where you are unsure. When you are done, write down the quiz results. I will collect it for a grade!!!