Physical Properties

Conductivity and MagnetismEQ: Which similarities can be used to classify substances on the basis of their conductivity and magnetic properties?

Agenda• Bell Ringer• PowerPoint with Cornell Notes• Gizmo Snippet • Brain Pop: Magnetism with Quiz• Investigation Activities• Independent Practice

Physical PropertiesA physical property is an characteristic of matter that can be observed or measured without changing it.

Examples:Physical Properties include:- Freezing Point- Boiling Point- Density- Magnetism- Conductivity

Physical properties such as those listed here are independent of sample size.

This means that no matter how big or small a piece of this matter is, this physical property does not change.

For example: a cup of water’s density of 1.0g/mL and a gallon of water’s density is 1.0g/mL.

Magnetism•Magnets are objects that produce an area of magnetic force called a magnetic field.•Magnetic fields by themselves are invisible to the human eye.•Iron filings can be used to show magnetic fields created by magnets (such as in the picture to the right).•Magnetism can attract magnetic objects or push them away.

What are magnets?

Magnetism•Magnets only attract certain types of metals, other materials such as glass, plastic and wood aren't attracted.•Metals such as iron, nickel and cobalt are the only metals attracted to magnets.•Most metals however are not attracted to magnets, these include copper, silver, gold, magnesium, platinum, aluminum and more.

What kinds of objects do magnets attract?

Elements with Magnetic PropertiesNot all metals have magnetic properties…

Myth buster: What is a common misconception about magnets?

Magnetism Gizmo Snippet

Have students complete gizmo left side sheet and glue into their interactive notebooks. The Gizmo has been modified and should take about 10 minutes to review.

Magnetism

Magnetism ActivityDrop nuts, bolts and paper clips into the water. Make a fishing pole: tie a string to a stick. Attach a small (donut hole) magnet to the end of the string. Let your student go fishing. Have them classify the objects into groups based on their characteristics then write a reflective summary about the similarities of the objects used in this quick activity.

Left Side Activity

SKIP:

ENRICHMENT ACTIVITY

ONLY

ConductivityIf you had to choose whether to stir a pot of boiling water with a wooden spoon or metal spoon, which one would you pick? Why?

ConductivityDefinition: The rate at which heat and electricity passes through a material. The most common conductors are metals. Materials that do not pass electricity and heat are called insulators.

HEAT ELECTRICITY

What is the difference between a conductor and an insulator?

Metals are good conductors…

Meh…kind of Nope

Yes!

Conductivity

Left Side Activity

Part 1: Electrical ConductivityIn this activity, you will build a simple electric device called a conductivity tester. You will use it to test whether a range of materials are electrical conductors or insulators. Part 2: Thermal ConductivityMaterials needed: Ice (Cubed)Density Blocks: Copper, Wood, Steel, Plastic, Aluminum10 Beakers5 Hot Plates

Set up: Place a density cube in 5 separate beakers. Place a cube of ice in the other 5 beakers. Place the density cube beakers on hot plates set at medium for two minutes. After two minutes, pour the density cube into the beaker with ice and observe how long it takes the ice to melt.

Independent Practice

Write all about it!