Why does a cook use a wooden spoon to stir a pot of soup? Explain (1-2 complete sentences) DO NOW (2 Minutes)

What did we learn the last class block? Review (2 minutes)

Physical property Any characteristic of a material that can be observed or measured without changing the composition of the substances in the material. Used to identify materials. WHAT?

There are 7 physical properties. WHAT?

Viscosity: a liquid’s resistance to flowing. The greater the viscosity, the slower the liquid moves. Property 1: Viscosity

Conductivity: A material’s ability to allow heat to flow. Materials with high conductivity are called conductors. Example: metals Property 2: Conductivity

Malleability: The ability of a solid to be hammered without shattering. Example: Most metals are malleable. Property 3: Malleability

Hardness: The resistance of an object to scratching. Property 4: Hardness

Melting Point: The temperature at which a substance changes from solid to liquid. Example: The melting point of ice is 32°F. Property 5: Melting Point

Boiling Points: The temperature at which a substance boils. Property 6: Boiling Point

Density = mass/volume Density can be used to test the purity of a substance. Mass: How much material an object is made of. Volume: How much space an object takes up. Property 7: Density

We can use the physical properties of matter to help us choose materials or to identify an unknown material. WHY?

We describe physical changes of matter by looking at size, shape, color, texture and any other properties that do not require us to change the materials the substance is made of. HOW?

Teacher Demo: Stacking Densities Anyone can stack blocks, boxes, or books, but only those with a steady hand and a little understanding of DENSITY can stack liquids. What if you could stack six different liquids in six different layers? Think of it as a science burrito! Guided Practice (5 Minutes)

Materials Density (g/cm³) Karo Corn Syrup 1.37 Water 1.00 Vegetable Oil Liquid dish soap 1.06 Rubbing alcohol Honey 1.42 Milk 1.03 Teacher Demo (5 Minutes)

Why was I able to stack the liquids on top of each other without them clashing? In your own words, what does density measure? What is the density of water? What could we say about the densities of the liquids below the water layer? Explain. What could we say about the densities of the liquids above the water layer? Explain. Demo Questions

List 7 examples of physical properties. 1 example for each property. Independent Practice (3 Minutes)

Clear your desk (except pencil) Noise level is ZERO READ and FOLLOW all directions. Finished? Name, date, block Place face down in your block tray. Exit Ticket (5 minutes)

Complete the Section 2.2 Physical Properties Homework Sheet. Homework (2 Minutes)

FEEDBACK: (3 MINUTES)

Students’ Responsibility Contact Ms. Williams Class Website Notes (Powerpoints) Homework Sheets Practice Sheets (in class work) MAKE UP WORK POLICY (4 MINUTES)

Exceptions (If you missed) Quiz (See Ms. Williams ASAP. You have 3 days to make these up) Test Lab Exit Tickets No Internet? Check Make up Work Folder (Upon Return) Due Dates Make up work due the NEXT DAY. (unless I tell you otherwise) 1 day late = loss of 1 letter grade 2 days late = ZERO MAKE UP POLICY