Please refer to the Homework Page on the EVMS website for any homework assignments or notes. I will post links here.
Friday, September 26, 2014
Wednesday, September 17, 2014
Chromatography lab 9-17
Using what you learned about filtration, how could
scientists use filtration to improve something we already have?
s Learning
Target
I will learn how chromatography is a physical change that
can be used to separate parts of a mixture.
s Criteria
for Success
I will be able to explain what kind of mixtures
can be separated by the physical change of chromatography. Students separated marker colors using water through filter paper.
Tuesday, September 16, 2014
Filtration/Evaporation Sept 15 and 16
Using what you learned about density (a physical property)
how could you separate a mixture of plastic chips (density 0.8 g/mL) and rocks
(1.4 g/mL). How does this relate to
essential question #2?
s Learning
Target
I will learn how filters can be used to separate parts of a
mixture based on the physical properties of the substances.
s Criteria
for Success
I will be able to explain how using a filter to separate a
mixture is a physical process.
s Filtration
The process of passing a liquid or gas through a filter in
order to remove solid particles.
Air Filters have tiny holes that let air through, but trap
particles in the air.
s Filtration
can be used to separate a mixture. Some parts of the mixture will go through
the filter, some will be trapped by the filter.
s Reflection
Explain how using a filter to separate a mixture is a
physical process.
• Give
an example of a mixture that can be separated by filtration. What type of
mixture is it? How is filtration helpful in your own life?
• Learning
Target
I will learn how evaporation and filtration can be used to
separate a mixture.
• Criteria
for Success
I will be able to give examples of mixtures that can be
separated using physical change. I will be able to explain what physical change
can separate those mixtures.
• Evaporation
The change of a liquid into a vapor at a temperature below
the boiling point.
• Evaporation
is a physical change! The water molecules spread out, but are still
water
molecules.
water
molecules.
• Was
your hypothesis right?
What was left in the filter for the salt water solution?
What was in the petri dish for the salt water solution?
What was left in the filter for the salt water solution?
What was in the petri dish for the salt water solution?
• Was
your hypothesis right?
What was left in the filter for the sand and water mixture?
What was in the petri dish for the sand and water mixture?
What was left in the filter for the sand and water mixture?
What was in the petri dish for the sand and water mixture?
• Reflection
Give examples of mixtures that can be separated using physical changes.
Explain what physical process can separate those mixtures.
Friday, September 12, 2014
Density lab-September 10
— Learning
Target
I will find the mass and volume of various objects. I will
use these measurements to find the density of each object. I will compare the
density of the different objects.
— Criteria
for Success
I will be able to place the
objects from my lab in order based on their density. I will be able to
explain how density is a physical property.
— Review
— Salt
is _________ in water
— Salt
is
soluble
in water.
soluble
in water.
— Sand
is ____________ in water
— Sand
is insoluble in water
— If
you can see sugar at the bottom of you solution it is a _________ solution.
— Milk
is a mixture. It is a ________.
— Milk
is a mixture. It is a colloid.
— Trail
mix is a ______________mixture.
— Trail
mix is a heterogenous
mixture.
mixture.
— Salt
Water is a type of ____________
— Salt
Water is a type of solution.
— Cake
batter is a __________ mixture.
— Cake
batter is a homogeneous mixture.
— We
are going to be going into the lab to find the density of different objects. Be
sure to follow all lab safety rules. Follow all my directions.
— Reflection
Place the objects from the lab we did today in order based
on their density. Explain how density is a physical property.
Density September 9
l Learning
Target
I will learn how to use mass and volume measurements to find
the density of objects and substances.
l Criteria
for Success
I will be able to explain how density can be used to compare
different objects and substances.
l Soluble
capable of being dissolved
Examples:
sugar and water
salt and water
l Insoluble
incapable of being dissolved
Examples:
sand and water
metal and water
l Saturated
Solution
A solution in which the maximum amount of solute has been
dissolved
l Unsaturated
Solution
A solution which can dissolve more solute
l Sugar
and Water Observation Activity
l Density
l What
is density?
Density is a comparison of how much matter there is in a
certain amount of space.
l Which
one is more dense?
Demonstration: People in a square
How about this: Which square is more dense?
l Which
one is more dense?
l Mass:
A measure of how much matter is in an object
Volume the measure of the amount of space something takes up
Volume the measure of the amount of space something takes up
Density = mass
volume
l Let’s
try a density problem together
Frank has a paper clip. It has a mass of 9g and a volume of
3cm3. What is its density?
l Let’s
try a density problem together
Frank also has an eraser. It has a mass of 3g, and a volume
of 1mL. What is its density?
l Work
on these problems with your table.
Jack has a rock. The rock has a mass of 6g and a volume of
3mL. What is the density of the rock?
l Work
on these problems with your table.
Jill has a gel pen. The gel pen has a mass of 8g and a
volume of 2cm3. What is the density of the gel pen?
l Now,
try these on your own.
Victoria has a watch. It has a mass of 4g and a volume of
2cm3. What is the density of the watch?
l Now,
try these on your own.
Mia has a wallet. It has a mass of 15g and a volume of 5cm3.
What is the density of the wallet?
l How
do we measure mass and volume?
Explain how density can be used to compare different objects
and substances.
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