Walking on Water

Butterfly Effect

Operation Oobleck

Fly Far! Habitat Hunters

Hovering Bubbles!

Missing two activities

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.

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.

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.

A. The mass of the dry, rusted nails will be more than the mass of the dry nails before they rusted.

B. The mass of the dry, rusted nails will be less than the mass of the dry nails before they rusted.

C. The mass of the dry, rusted nails will be the same as the mass of the dry nails before they rusted.

Material from which the exam will be drawn:

A. Text content readings.B. Handout content readings.C. Diagnoser assignments.D. Pre/Post-assessment.E. Classroom activities.F. Homework.G. Power Points from class.

The exam will have:

A. Short discussion questions.B. Multiple choice.C. Question (s) on a live

demonstration.D. Perhaps a performance part.

Classroom Activities:

A. Gravity On A RollB. Egg-tivityC. Level the LeverD. Puzzling PyramidsE. By Golly By Gum By TimeF. Gravitational and Potential Energy –

marble and cupG. ReactionsH. TELS: Heat and Temperature online at

WISE

Principles:

A. Newton’s LawsB. Simple machinesC. Energy ConservationD. Mass ConservationE. Thermal equilibriumF. Heat Flow

Formulas:

A. Net Force = Mass x AccelerationB. Mechanical Advantage = Load / EffortC. Gravitational Potential Energy is

proportional to HeightD. Kinetic Energy is proportional to the

square of the speedE. Stored spring energy is proportional to

the square of the stretch

Motion

is described by

has

Velocity

Change in position with time

andSpeed Direction

Acceleration

Change in velocity with time

andor

Change of speed

Change of direction

Position

Location in space

has

x

Simple Types of Motion

include

Uniform Velocity

Speed = constant Direction = constant Acceleration = 0 Velocity = position change divided by time

Constant Linear Acceleration

Acceleration = constant Motion along a line Constant change in speed Acceleration = velocity change divided by time

Position is fixed

Velocity = 0

Acceleration = 0

Velocity = slope of position vs. time curve

Acceleration = slope of velocity vs. time curve

in general

General Motion

can be shown by

Freely falling objects all accelerate at the same rate

freefall

All Motion

can be described using

Velocity = slope of position vs. time graph at point in time

Acceleration = slope of velocity vs. time graph at point in time

Plots or graphs

Slope is rise over run

rise

run

rise

run

rise

run

steeper slope shallower slope negative slope

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

Body A Body B

Newton’s First Law

It takes a net force to change the motion

A on B

B on A

Simple Machines

is described by

The force of the effort can be smaller than the load. You can effectively multiply the effort.

The load can move farther than the effort. You can multiply the distance moved.

Mechanical Advantage = load divided by effort

Because energy must be conserved, you can’t do both with the same machine.

effort

load

Energy

is described by

In a closed system the total energy of all the forms stays constant. We say energy is conserved.

Energy can be transformed from one form into another. It can’t be created or destroyed

Energy has many forms. Examples are Gravitational Potential Energy and Kinetic Energy.

The Universe is the ultimate closed system. Small systems can be considered closed if you don’t let energy in or out.

Power is energy transferred, created

or consumed per time. It isn’t the

same thing.

Work in the simplest case is

force times distance. It is energy. Work can transfer energy

into or out of a system.

Matter

is described by

In a closed system the total mass of all the matter forms stays constant. We say mass is conserved.

Matter can be transformed from one form into another. It can’t be created or destroyed.

Matter has many forms. Examples are elements, molecules, compounds and mixtures.

The Universe is the ultimate closed system. Small systems can be considered closed if you don’t let matter in or out.

Matter also has many phases like solid, liquid, gas, plasma, amorphous, liquid crystal, etc.

Heat and Temperature

are described by

Temperature is the concentration of heat energy. If the heat energy is more concentrated, the temperature is higher.

All bodies in the same steady environment always come to the same temperature given enough time.

Heat is a form of energy. Heat flows from a warm to a cool body. Cooling is heat leaving. Warming is heat entering.

Analogy: saltiness of seawater. Temperature is an intensive property.

Analogy: total amount of salt in seawater. Heat is an extensive property.

Bodies at the same temperature can feel hotter or cooler because of the different rates at which they transfer heat.

Changes of phase are often accompanied be heat transfer.

Questions?

A. Motion and forceB. Simple machinesC. Energy and massD. Heat and temperature

Demonstrations:

A. Circular motionB. Energy transformationsC. Two identical balls?D. The Heat Solution

A

B

C

D

E

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.

concrete

abstract

A.

B.

C.

D.

E.

A.

B.

C.

D.

E.

A B C D E

A.

B.

C.

D.

E.