Monday September 22, 2014HOMEWORK 1. Complete Cornell notes 3 QUESTIONS and SUMMARY2. Memorize exponents for Metric Scale**TEST IS THURSDAYREMINDERS• Check CALCULATOR

• Check the board for QUIZ grades.

• Retakes must be done by THURSDAY.

TO DO RIGHT NOW:1. Turn in HW “Mixed Review” odds are due today

– Cornell notes over DENSITY– Basic Density Problems

About Miss Russell• Graduated from HHS in 2010• Graduated from Texas A&M University in 2013 with a Bachelor’s of

Science in Health• Starting Nursing School at Texas Woman’s University in January

Equation

D=m

V

D: density (g/mL or g/cm3)

m: mass (g)

V: volume (mL or cm3)

Example #1

• What is the density of a material that has a mass of 15 g and a volume of 3 mL?

D = m = 15 g = 5 g/mL______

3 mL

__

v

Example #2

• What is the mass of an object if its density is 2 g/cm3 and its volume is 5 cm3?

2 g/cm3= 10 gD =

m

V= m

5 cm³

_____

• A sample of water has a mass of 10.0 g and a volume of 10.0 mL. What is the

density?

• Half of the water is removed. What is the

density?

m = _______

V = _______

10.0 g

10.0 mL

D =

D = 1.00 g/mL

10.0 g 10.0 mL

m = _______

m

v=

V = _______

m

vD = =

5.00 g

5.00 mL

5.00 g 5.00 mL

D = 1.00 g/mL

Density ColumnIn

creasi

ng D

ensi

ty

Largest Density

Smallest Density

Density Column

ObjectDensity(g/mL)

granite rock

2.75

plastic block

1.04

Ivory soap 0.9wood block 0.65golf ball 1.15

granite rock

golf ball

plastic block

Ivory soap

wood block0.75

1.00

1.10

1.25

Density of Liquids (g/mL

Density Column

• Objects can be suspended in a density column

• Objects will position themselves on the column according to their densities.

What goes where???

ColorDensity(g/mL)

red 1.00green 0.75blue 1.10orange 1.25