BellRingers

1
Bell-Ringers

• 10 June 2009

2
Bell-Ringer

• 2nd pd, 10 June 2009
• LT Describe fundamental properties of matter
  (mass, weight, volume, density).
• Galileos Thermometer shows the temperature using
  floating objects. The lowest floating object
  shows the temperature. Explain how you think this
  might work.

3
Two tools are most often used to measure the MASS
(amount of matter) and WEIGHT (gravitational
force).
4
Mass Measured in kilograms (kg) with a
BALANCE. Weight Measured in newtons (N) with a
spring SCALE.
5
Mass NOT affected by gravity. Weight AFFECTED
by gravity.
6
Mass, Volume, Density

• Mass
• Amount of matter in an object (kg or g)
• 1 small paperclip has a mass of about 1 gram
• Volume
• Amount of space an object takes up (L or mL)
• 20 drops of water take up 1 mL (1 cc) of volume
• Density
• How tightly packed something is
• The density of water is about 1 gm/mL

7
Mass

• Mass is the amount of material in the toy box.

8
Volume

• Volume is how much space the toy box contains.

9
Density

• Density is how tightly things are packed.
• Can you think of things that are high density?
• Can you think of things that are low density?

10
Summary

• Mass is so much matter
• Volume is so much space
• Density is so much matter contained in so much
  space

11
Bell-Ringer

• 3rd pd, 10 June 2009
• LT Measure the mass, volume, and density of a
  material.

Sociologists might speak about the population
density of a community. What does this mean? How
is this related to the density of a material?