• "TO CHANGE"
• change in nature, state, form, condition, or appearance

Energy can be TRANSFORMED from one form to another.

• a device, usually made of a container that holds two electrodes and an electrolyte, that transforms chemical energy into electrical energy.
• Makes energy portable.

• A strip or rod (usually metal) set in the electrolyte in a battery. 
• An electrode makes up one terminal of a battery.

• A liquid or paste, often an acid, in which the electrodes of a battery are set.

• A battery cell made of two electrodes placed in a liquid electrolyte.

• CHEMICAL ENERGY

• LIGHT ENERGY
• THERMAL ENERGY

1. To separate the electrodes.

2. To absorb more electrolyte, so when we removed the assembly, the chemical reaction continued and kept the light on.

• The ability to do work.
• Energy exists in many forms: chemical, mechanical kinetic, electrical thermal, nuclear, and light.

• Energy associated with moving bodies.

• Stored energy that can be released
• includes chemical, electrical, gravitational, and nuclear energy.

• A battery that can be placed in a battery charger so that energy can be stored in it for later use. 
• Rechargeable batteries can transform electrical energy into chemical energy.

• "TO CHANGE"
• change in nature, state, form, condition, or appearance

Energy can be TRANSFORMED from one form to another.

This tool is a __________________.

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What is the manipulate variable?

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The performance of a motor depends on the _________________ of the batteries supplying energy for its operation.

Motors exert ___________ and the forces can be measured.

A scientific experiment has both manipulated and _________________________ variables.

Valid conclusions are based on experimental ______________.

The three manipulated variables in Inquiry 7.1 were:

• number of batteries
• arrangement of batteries (series vs. parallel)
• pulley vs. nail. (diamenter of shaft)

Which provides more force?

Wrapping the string around the nail or wrapping the string around the pulley?

Which arrangement of batteries allowed the motor to exert more force?

Series or parallel?

Which arrangement of batteries would last longer?

3 D size batteries connected in series 

or

3 D size batteries conneceted in parallel

The metric unit of measure for work is the _____________________________?

If a force is applied to an object and the object does not move, how much work has been done?

None!

An object must move for work to be done.

What force are you working against when you lift the head  of a snowman up and place it on the body?

Alan lifted a 20 N suitcase up and placed it in the back of a truck.  The height of the bed of the truck is .75 meters.

How much work did Alan do?

Feel free to use a calulator.

15 Nm or 15 J

Work = 20N x .75 m

Work = 15 Nm or 15 J

8 Newton-meters (Nm) is equal to how many Joules(J)?

work ÷ time

OR

(Newton x meter) ÷ seconds