1. Topic-
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| States Of matter: solid to liquid, liquid to solid. Crystallization |
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2. Content-
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| Definitions: Solid, liquid, crystallize, evaporate,supersaturated. |
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3. Goals: Aims/Outcomes-
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1. Explain the difference between a solid and a liquid.
2. Explain how combining a solid and liquid changes both a solid and
a liquid.
3. Explain how heating and cooling solids and liquids change them. |
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4. Objectives-
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1. Identify two of the three states of matter.
2. observe how heating and cooling changes the matter.
3. Investigate and observe how mixtures can be made by combining solids
and liquids. |
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5. Materials and Aids-
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| Hot plate, wooden spoon,sauce pan or pot,goggles, apron, oven mitten,
water, sugar, food coloring, flavoring,wax paper,marker,paper tape,
magnifying glass,measuring cup, candy thermometer, glass jar, wet
string, nail, paper clip. Technology needed- web camera, laptop, projector
and screen. |
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6. Procedures/Methods-
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A. Introduction-
| Has anyone ever made their own candy before? Well today for our
science lesson we will be making rock candy, does anyone know what
that is? Well rock candy is a syrup mixture that looses moisture and
forms little crystals that look like little rock formations. I'm sure
if you ask your parents or grandparents what rock candy is they could
tell you all about it. Our color and flavor for the candy will be |
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B. Development-
| First thing we are going to do is gather all our supplies and make
sure that we have everything. We need a hot plate, wooden spoon,sauce
pan or pot,goggles, apron, oven mitten, water, sugar, food coloring,
flavoring,wax paper,marker,paper tape, magnifying glass,measuring
cup, candy thermometer, glass jar, wet string, nail, paper clip. Each
of you have a piece of string and as well as a paper clip and nail
tie one to each end of the string and place them in the jar with the
nail stretched across the top of the jar and the paper clip in the
bottom. Place a piece of tape with your name on it on the side of
the jar and line them up on the counter at left side of the room according
to your tables. Okay to begin I put on my safety gear of goggles,
apron and oven mitten because the mixture will become very hot and
we want to be safe, we then begin with mixing four cups of sugar to
two cups of water in our pan as you can see on the screen at the front
of class. As you watch you will see the sugar crystals dissolve into
the water and the mixture starting to form bubbles which will bring
it to a boil. At your tables you have magnifying glasses look at the
sugar crystals I have given you and write down what you see while
we wait for the mixture to boil. Once the mixture is boiling and has
doubled in size we cut off the heat and remove it from the burner
and add in our flavoring and food color. I will then pour the mixture
into each of your jars and we will let them set for seven days without
touching them. Everyday you will need to look at your jars and draw
what you see. At the end of the seven days you will have something
that looks like this ( pulls out a premade piece of rock candy that
was made using this experiment. ) Now that the experiment is over
lets go back and break down everything that we did. Can someone tell
me the difference between a liquid and a solid? What did you notice
about the sugar crystals that we began with and what can you tell
me about the sugar crystals in the pieces of rock candy I am passing
out. Do not eat them. Good that is correct they are similar because
the rock candy was made from the sugar crystals. |
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C. Practice-
1. students will make lists of solids and liquids and compare and
contrast them.
2. Students will assess what liquids can turn into solids and what
solids turn into liquids.
3. Students will mix solids and liquids to determine if they are compatible
and what the outcome would be if they were heated or cooled. |
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D. Independent Practice-
| Students will draw what they see developing over the seven day period
and predict what they think will happen. They will journal their thoughts
on solids and liquids. |
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Closure-
| At the end of the seven day period the students will then explain
as a group what the process was of making rock candy as well as what
the difference in solid and liquids are. |
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7. Evaluation-
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| Mini True/False quiz to assess today's understanding. Brief pupils
on their ongoing assignment: Over the seven days, pupils will: note
down what changes that they see happening as well as keep a journal
to demonstrate the changes over time, such as the liquid disappearing
and the the crystals forming. |
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