# Happy and Sad Egg Prelab ```Happy and Sad Egg Pre-Lab
Learning Targets
• I will be able to define density, mass and
volume and be able to apply them using
the equation d=m/v.
• I will be able to describe why models are
necessary for science.
Scientific Language Cards
• Volume: amount of SPACE or room
an object occupies
• Models: help visualize concepts that
are too large, small, or complex to directly
observe.
• Density: MASS per unit volume
Video Clip on Density/Volume
PgLT8Fk
Definitions
• Models—help visualize concepts that are
too large, small, or complex to directly
observe.
– Example: Model of the solar system
– Example: Model of an atom
Definitions
Volume: amount of SPACE or room an object
occupies
(not capacity – capacity is how much an object
holds)
If the object has a “regular” geometric shape such as
a rectangle, you can multiply length x width x
height (cm3) to get the volume
V = lwh
If it is “odd” shaped such as a sinker used for fishing,
how would you find the volume?
Put it in water and see how much the volume of the
water increases!
Definitions
Density: MASS per unit volume
Simple definition: It is the mass of ONLY
one cubic centimeter of a substance.
Remember: 1 cm3 = 1 mL
Everyday words: how tightly PACKED the
matter is making up an object
Thinking Question
• I have a 2 liter bottle of sand and I find its
mass to be 2600 g. How can I figure out
the mass of only 1 mL or cm3 of sand????
• Answer: Divide the total mass (grams) by
the total volume (milliliters) to get the mass
of 1 mL.
Density
mass
Density 
volume
m
D
V

kg or g
mL, L, cm 3 , or m 3
(D = m/V a.k.a. – Department of Motor Vehicles!)
FYI: Pure water has a density of 1 g/mL. That means
one milliliter or cm3 of water has a mass of 1.0
gram
Newspaper- Physical Properties
page 16
• Develop a newspaper page with 3 different
articles explaining 3 different examples of
physical changes occurring today.
• Illustrate a comic strip showing a physical
change
```