1. Earth Science August 30, 2011 Bellringer: Place on your metric mania worksheet Convert 5.789 mm = _______________ m 623 L = _____________________ ml

2. Earth Science Objectives: Determine density of various objects Agenda Finish Lab #3: measurement Density notes Density worksheet Homework: Finish Density Worksheet

3. Earth Science Density

4. Earth Science What is density? The amount of matter (stuff) in a specific space Formula: Density = Mass Volume

5. Earth Science Formula D= density M= mass V= volume D= m/v M= d x v V= m/d m d v

6. Earth Science Density of Water H 2 O = water 1 g/ml or 1 g/cm 3

7. Earth Science All about Density It does not depend on size or shape Maximum (highest) density is in Solids Gases have the lowest density But water is the exception

8. Earth Science To Measure Density: By flotation- put the object in a liquid. If it floats- its density is less than the density of the liquid If it sinks- its density is more than the density of the liquid.

9. Earth Science Things that affect density Heating- of a solid, liquid, or gas make it expand (spread out). The volume gets larger, so the density gets smaller.

10. Earth Science Things that affect density Cooling – a solid, liquid, or gas makes it contract (get smaller). The volume gets smaller, so the density gets higher.

11. Earth Science Things that affect density Increasing pressure on a gas makes the volume get smaller. The density gets higher.

12. Earth Science Review What is the formula for density? How can you find mass if you know the volume and density?

13. Earth Science Review How can you find volume if you know the mass and density? An object has a mass of 3 g and a volume of 6 cm 3. What is the density? What is the mass of an object that has a density of 3 mg/cm 3 and a volume of 2 cm 3 ?