Today is: Thursday, September 15th
9/15/2016 #thinkaboutitthursday
1. What does this rebus puzzle mean?
2. Riddle: I’m tall when I’m young and short when I’m old.
What am I?
Agenda:
● Volume,
Mass, Weight,
Density
Science News: What happens when you’re struck by lightning?
http://safeshare.tv/x/fhjx6lGTDhw
3. What is lightning? What happens when you are struck
by lightning? Summarize today’s news in 3 complete
sentences.
Last Class:
● Kahoot
● Classification
of Matter
Quiz
Next Class:
● Density Lab
Learning Target:
● I can explain and calculate density.
Physical
Properties of
Matter
Volume, Mass, Weight, Density
I am able to identify: matter based on physical/chemical properties, the evidence of a
physical/chemical change and how the transfer of energy affects the physical/chemical
properties of matter.
4
3
2
In addition to mastering
level 3, I make in-depth
inferences and
applications that go
beyond what was taught
in class.
I am able to classify:
I can define the following terms:
●
Physical properties
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
(states, density, boiling
point, melting point,
solubility)
●
Chemical properties
(reactivity, pH,
acid/base/neutral,
oxidation)
●
Physical Changes (i.e.,
phase change)
●
Chemical Changes (i.e.,
color change,
endothermic, exothermic,
generation of a gas,
precipitate)
I am able to explain:
●
how the transfer of energy
can affect the
physical/chemical
properties of matter.
•
1
Physical property
State (solid, liquid, gas)
Density
Boiling point
Melting point
Solubility
Physical Change
Phase change
Chemical property
Reactivity
pH, acid, base, neutral
oxidation (corrosion)
Chemical reaction
Color change
Generation of gas
Precipitate
Endothermic reaction
Exothermic reaction
With help, I can perform at
level 2.
Volume and Mass
Some physical properties of matter can be measured exactly.
Two such properties are volume and mass.
Volume
▪
▪
is the amount of space a
substance occupies.
is typically measured in
cubic centimeters (cm3)
or milliliters (mL).
Mass
▪
▪
is the amount of matter that
makes up a substance.
is typically measured in grams
(g) or kilograms (kg).
Physical
Property
Can be observed or measured without changing the
chemical identity of matter. Physical properties are used
to observe and describe matter.
Physical properties include: appearance, texture, color,
odor, melting point, boiling point, density, solubility, and
many others.
Weight
× Usually, if people ask you how much you weigh, they really
mean to ask what your mass is. The weight of a substance is
determined by two factors: the mass of the substance AND the
force of gravity acting on it.
× For example, astronauts walking on the Moon have the same
mass they have on Earth, but their weight is much lower
because the Moon’s gravity is weaker than Earth’s. If you went
aboard the International Space Station, your mass would be
the same but you would be practically weightless. Because
weight changes with location, it is not considered to be a
property of an object.
If you throw a rock into
a pool, what will happen?
What if you throw a piece
of wood?
Why do you think this
happens?
Big
Density
Density
Density is defined as the ratio between mass
and volume. It is a measure of the degree of
compactness of a substance.
Density
× Density is a physical property of a
substance.
× The density of a substance is the
relationship between the mass and
how much space it takes up (volume).
× The mass of atoms, their size, and how
they are arranged determine the
density of a substance.
× Density equals the mass of the
substance divided by its volume.
× D = m/v.
× Objects with the same volume but
different mass have different densities.
Water has a
density of
1 g/cm3.
mass
Density
volume
What state of matter d
o you think is the LEAST
DENSE?
why?
Solid
Liquid
Gas
How do
hot air
balloons
work?
Place your screenshot here
Energy transfer
affects physical
properties of air
inside a hot air
balloon because the
air's density
increases and
decreases with
addition or
reduction of
heat/energy.
Place your screenshot here
Practice calculating d
ensity
1. What is the density of a piece of wood that has a
mass of 25.0 grams and a volume of 5 cm3?
2. What is the density of an object with a mass of
120g and a volume of 6mL?
3. A piece of wood that measures 3.0 cm by 6.0
cm by 4.0 cm has a mass of 80.0 grams. What is
the density of the wood? Would the piece of
wood float in water? (volume = L x W x H)
Academic Lab
Adopt an Element
Project
Element Cards
*Due AcLab the last week of Q1.*