Missing two activities

1. Missing two activities

2. Post-Assessment 1:https://cnu.edu:8443/survey/entry.jsp?id=1171412917302 There is a link on the class web page. The password is nsci310. It is case sensitive.

3. WISE TELS Activity (online part):If you can’t see the discussion or can only see your own principle, then go on to Activity 8 and complete it the best you can. You may not be able to do the post-test. If it doesn’t appear after you complete Activity 8, don’t worry about it. If you had a partner, you will both get the same grade.

4. The Rusty Nails: total mass of nails before, moist dish, open dish, dry completely, don’t let rust fall off, total mass of dry rusted nails after. • The mass of the dry, rusted nails will be more than the mass of the dry nails before they rusted. • The mass of the dry, rusted nails will be less than the mass of the dry nails before they rusted. • The mass of the dry, rusted nails will be the same as the mass of the dry nails before they rusted.

5. Material from which the exam will be drawn: • Text content readings. • Handout content readings. • Diagnoser assignments. • Pre/Post-assessment. • Classroom activities. • Homework. • Power Points from class.

6. The exam will have: • Short discussion questions. • Multiple choice. • Question (s) on a live demonstration. • Perhaps a performance part.

7. Classroom Activities: • Gravity On A Roll • Egg-tivity • Level the Lever • Puzzling Pyramids • By Golly By Gum By Time • Gravitational and Potential Energy – marble and cup • Reactions • TELS: Heat and Temperature online at WISE

8. Principles: • Newton’s Laws • Simple machines • Energy Conservation • Mass Conservation • Thermal equilibrium • Heat Flow

9. Formulas: • Net Force = Mass x Acceleration • Mechanical Advantage = Load / Effort • Gravitational Potential Energy is proportional to Height • Kinetic Energy is proportional to the square of the speed • Stored spring energy is proportional to the square of the stretch

10. x Motion is described by Velocity Change in position with time Acceleration Change in velocity with time Position Location in space has has Change of speed Change of direction and Speed Direction and or

11. Freely falling objects all accelerate at the same rate Simple Types of Motion freefall include Constant Linear Acceleration Acceleration = constantMotion along a line Constant change in speed Acceleration = velocity change divided by time Uniform Velocity Speed = constant Direction = constant Acceleration = 0 Velocity = position change divided by time Position is fixed Velocity = 0 Acceleration = 0 General Motion Acceleration = slope of velocity vs. time curve Velocity = slope of position vs. time curve can be shown by in general

12. All Motion can be described using Acceleration = slope of velocity vs. time graph at point in time Velocity = slope of position vs. time graph at point in time Plots or graphs Slope is rise over run rise rise rise run run run shallower slope negative slope steeper slope

13. Change in motion caused by net force is described by Newton’s Second Law Net Force = mass times acceleration Newton’s Third Law Forces come in pairs Newton’s First Law It takes a net force to change the motion B on A Body B Body A A on B

14. Simple Machines is described by The load can move farther than the effort. You can multiply the distance moved. The force of the effort can be smaller than the load. You can effectively multiply the effort. Mechanical Advantage = load divided by effort load effort Because energy must be conserved, you can’t do both with the same machine.

15. Work in the simplest case is force times distance. It is energy. Work can transfer energy into or out of a system. Power is energy transferred, created or consumed per time. It isn’t the same thing. Energy is described by Energy has many forms. Examples are Gravitational Potential Energy and Kinetic Energy. Energy can be transformed from one form into another. It can’t be created or destroyed In a closed system the total energy of all the forms stays constant. We say energy is conserved. The Universe is the ultimate closed system. Small systems can be considered closed if you don’t let energy in or out.

16. Matter is described by Matter has many forms. Examples are elements, molecules, compounds and mixtures. Matter can be transformed from one form into another. It can’t be created or destroyed. In a closed system the total mass of all the matter forms stays constant. We say mass is conserved. Matter also has many phases like solid, liquid, gas, plasma, amorphous, liquid crystal, etc. The Universe is the ultimate closed system. Small systems can be considered closed if you don’t let matter in or out.

17. Changes of phase are often accompanied be heat transfer. Heat and Temperature are described by All bodies in the same steady environment always come to the same temperature given enough time. Temperature is the concentration of heat energy. If the heat energy is more concentrated, the temperature is higher. Heat is a form of energy. Heat flows from a warm to a cool body. Cooling is heat leaving. Warming is heat entering. Bodies at the same temperature can feel hotter or cooler because of the different rates at which they transfer heat. Analogy: saltiness of seawater. Temperature is an intensive property. Analogy: total amount of salt in seawater. Heat is an extensive property.

18. Questions? • Motion and force • Simple machines • Energy and mass • Heat and temperature

19. Demonstrations: • Circular motion • Energy transformations • Two identical balls? • The Heat Solution

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21. concrete abstract The old incorrect “impetus” theory presumed that the force applied to an object sticks with the object even after the force is no longer in contact with the object.

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