Density
Define density
Density – mass of a material in a given volume
Define volume
Volume -amount of space the object takes up
Define mass
Mass- how much matter is in the object
What does matter mean?
Anything that has mass and occupies space
What is the formula triangle
m
------
d x v
Identify what the density of an object would be given its density in a different size. For example, if the density of a big block of gold is 19.3 g/ml, then what is the density of a tiny piece of gold?
19.3 g/ml
m=10
d=5
whats the volume
2
What is something that is/has mass
varying answers
List one thing that is matter
Shoes, air, rain, cookies, gas
Give an example of an experiment where the mass would change.
Answers will vary. Some examples: Measure the mass before and
after you burn wood in a fireplace, Measure the mass before and after
you boil water (open systems)
An object has a density of 2.3g/ml. Will it sink or float in water? Explain.
It would sink. The object is denser than water. Water has a density of 1g/ml.
How do you calculate volume?
mass divided by density
State and explain the law of conservation of mass.
Matter is neither created nor destroyed during a physical or chemical change
b. List one thing that isn’t matter
Ideas, Gravity, Happiness
Give an example of an experiment where the mass would not change.
Answers will vary. Some examples: Measure the mass before and after
you crush a can, Measure the mass before and after you let an apple rot
in a closed jar for 2 weeks (closed systems
What is the formula for density? (what does density depend on?)
Density = Mass divided by volume
M=25 g
V = 5 cm3
D = m ÷ v
D = 25g/5 cm3
D = 5g/cm3
. M = v * d
M = 89cm3 * 7.9 g/cm3
M = 703.1
True or False: Gases are the only state of matter that can move freely.
false liquid can
What is the difference between an open and closed system?
Closed System - A system where matter neither enters nor leaves
Open System – a system where matter can enter or escape
What does high density look like?
Compact with partiles ect
What does high volume look like?
big
v=123.5
d=121
whats the mass
14,943.5
How is a chemical change different than a physical change?
varying answers
What does the steeper slpe on a graph represent
density is high