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Aim: How do we calculate density?. Do Now: Convert the following metric units 564 L = ____ mL 600 Hg = ____ dg 1.23 g = ____ cg 1.3 Dm = ____ Km .02 KL = ____ mL 99 dm = ____ Dm Homework: Study for metric quiz. Introduction to Density. What is density?.

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aim how do we calculate density
Aim: How do we calculate density?

Do Now: Convert the following metric units

564 L = ____ mL 600 Hg = ____ dg

1.23 g = ____ cg 1.3 Dm = ____ Km

.02 KL = ____ mL 99 dm = ____ Dm

Homework: Study for metric quiz

what is density
What is density?
  • Density is a specific property of matter that is related to the mass divided by the volume
what is the formula for density
What is the formula for density?
  • D = _Mass_

Volume

  • D = M

V

  • D = Density
  • M = Mass
  • V = Volume

M

D

V

why does a penny sink in water
Why does a penny sink in water?
  • Pennies are more dense than water, therefore they sink
why does ice float in water
Why does ice float in water?
  • Ice cubes are less dense than water, therefore they float
how will an egg float in water
How will an egg float in water?
  • Egg in fresh water
    • The egg will sink because it is more dense than the fresh water
how will an egg float in water1
How will an egg float in water?
  • Egg in salt water
    • The egg will float because it is less dense than the salt water
how will an egg float in water2
How will an egg float in water?
  • Egg in fresh and salt water
    • The egg will be suspended in the middle because it is the same density as the water mixture
work on the density calculations

Work on the Density Calculations

Check your answers with your neighbor

how do we calculate density in 3 easy steps
How Do We Calculate Density in 3 Easy Steps?
  • Step 1
    • Calculate the mass of your object using the triple-beam balance
how do we calculate density in 3 easy steps1
How Do We Calculate Density in 3 Easy Steps?
  • Step 2
    • Calculate the volume
      • Measure the length, width and height and use the volume formula
      • Use the graduated cylinder for liquids or irregular solids
how do we calculate density in 3 easy steps2
How Do We Calculate Density in 3 Easy Steps?
  • Step 3
    • Use the density formula

D = _Mass_

Volume

summary
Summary
  • What is density?
  • Is Ice more or less dense than water? Why?
  • Name an item that is more dense than water.
  • Why does an egg float in salt water?
  • How can we calculate the density of common items?