You will Need:1)Pencil, Colored Pencil,

Highlighters, Calculator2)Density – 2 pages 4 sides –

Bookshelf- Please staple3) Log #3 – Bookshelf- Update –

Managers Log in4) Power Notes – Physical vs.

Chemical Changes + Cornell Notes – Due Now

1) Density – Due on Friday – Oct. 18th

2) Binder Check #2 – Due Thur. Oct. 17th at the beginning of class

3) Test #2 – Thur. Oct. 17th- Target Concepts on-line- ½ page of notes front side only done by hand

Density is a helpful property of matter when trying to distinguish different substances. The value of Density is determined by dividing the AMOUNT of MASS by the AMOUNT of VOLUME for a particular substance.

The density of water is 1 g/mL. If an object has a density GREATER than “1 g/mL” it will SINK. If the object has a density LESS than “1 g/mL” it will FLOAT. However, if an object has a density EQUAL to “1 g/mL it will FLINK.

Mass UNIT GRAM or any form of gram…kg, cg, mg

Volume UNIT mL, cc, cm3, m3

L

Density UNIT Combination unitg/mL, g/cc, g/cm3

mass volume

Substance Describe Unit Label

Method #1

Liquid mL

Method #2

Regular geometric shape

cm3

Method #3

Irregular shaped object

mL, cm3 or cc

Substance Describe Unit Label

Method #1

Liquid mL

Method #2

Regular geometric shape

cm3

Method #3

Irregular shaped object

mL, cm3 or cc

L x W x H

b x h

a x h

When working with the density formula you won’t always be finding density.

You can use the “TRIANGLE TRICK” to help figure out how to find the missing quantity (number, variable).

1) Identify which number values you have by looking at the unit label (mass, volume or density?)

Mass UNIT GRAM or any form of gram…kg, cg, mg

Volume UNIT mL, cc, cm3, m3

L

Density UNIT Combination unitg/mL, g/cc, g/cm3

mass volume

2) Place each number into their correct place in the triangle.

Volume Number

Mass Number

Density Number

3. If you have a top and bottom variable in the triangle – DIVIDE (numerator by denominator) to find the missing variable.

If you have the two variables on the bottom – MULTIPLY them to find the top variable.

Volume Number

Mass Number

Density Number

divide

multiply

1. Complete all the problems by showing your work.

2. Hint: If the problem is worth more than 5 points you may have to:

1) Solve for Volume First, then Solve for Density

2) Answer a question as well

1. Binder Check #2 – Due Thursday at the beginning of class

2. Test #2 – ½ page of notes due Thursday. Front side only, done by hand

3. Density – 2 pages 4 sides – Due Friday at the beginning of class.