Please watch the video of the lesson to review any information you need.
Separating the blood mixture
Blood is a mixture, and different parts of blood do different things. Plasma is the liquid part of blood.
Scientists use the properties of the different parts of blood to separate the mixture. Plasma has the property of being liquid at room temperature, while the other parts of blood are solid at room temperature.
Question 1
1.
What properties of substances or properties of molecules did scientists use to separate the blood mixture?
Sentence starter: Scientists used ____________________ property to separate the blood mixture.
Separating Ocean Water
Question 2
2.
What properties of substances or properties of molecules did scientists use to separate the salt water mixture?
Sentence starter: Scientists used ____________________ property to separate the salt water mixture.
Question 3
3.
What does our key concept help us understand about the properties of the molecules in the solid and liquid parts of blood?
COLOR CHANGING MODEL
What happened to the dye and water molecules during chromatography?
The water molecules were attracted to the paper molecules, so the water molecules climbed up the paper.
As they passed through the food-coloring mixture, the water molecules bumped into the dye molecules, and the water molecules changed to the same colors as the dye molecules. The colored-water molecules kept traveling up the paper.
The light blue molecules are the lightest, so they went the farthest. The red water molecules are the heaviest, so they did not go as far.
Question 4
4.
Does the model explain how the water traveled up the paper?
Question 5
5.
Does the model explain how the colors moved up the paper?
Question 6
6.
Does the model explain why some colors went higher?
COLOR CHANGING MODEL
Question 7
7.
Does the model fit with Statement A: All molecules of one substance are exactly the same, and they are different from molecules of any other substance.
Question 8
8.
Explain your answer for question number 7
Question 9
9.
Does the model fit with Statement B: The properties of the molecules of a substance do not change.
Question 10
10.
Explain your answer for question number 9
GROWING MODEL
What happened to the dye and water molecules during chromatography?
The water molecules were attracted to the paper molecules, so the water molecules climbed up the paper.
As the water molecules passed through the food coloring, they attached to the dye molecules and made the dye molecules grow, so the dye traveled up the paper.
The molecules of blue dye grew the most, so they went the highest. The molecules of red dye grew less, so thy did not go as high.
Question 11
11.
Does the model explain how the water traveled up the paper?
Question 12
12.
Does the model explain how the colors moved up the paper?
Question 13
13.
Does the model explain why some colors went higher?
GROWING MODEL
Question 14
14.
Does the model fit with Statement A: All molecules of one substance are exactly the same, and they are different from molecules of any other substance.
Question 15
15.
Explain your answer for number 14
Please watch the video of the lesson to review any information you need.
Question 16
16.
Does the model fit with Statement B: The properties of the molecules of a substance do not change.
Question 17
17.
Explain your answer for number 16
ATTRACTION MODEL
What happened to the dye and water molecules during chromatography?
The water molecules were attracted to the paper molecules, so the water molecules climbed up the paper.
The dye molecules were also attracted to the water molecules. Since they were attracted to the water molecules, the dye molecules got carried up the paper. At some point, the dye molecules were more attracted to the paper molecules than to the water molecules, so they stopped moving up.
Question 18
18.
Does the model explain how the water traveled up the paper?
Question 19
19.
Does the model explain how the colors moved up the paper?
Question 20
20.
Does the model explain why some colors went higher?
ATTRACTION MODEL
Question 21
21.
Does the model fit with Statement A: All molecules of one substance are exactly the same, and they are different from molecules of any other substance.
Question 22
22.
Does the model fit with Statement B: The properties of the molecules of a substance do not change.
Question 23
23.
Which model do you think is the most accurate - color changing, growing, or attraction model?