Data Sheet for Task 1: Mixing It Up!
1. Mix 25 ml water and 1 ml of Mystery Material A in a small container. Then mix 25 ml water and
1 ml of Mystery Material B in another container. Put the lids on and shake them well.
Observations
Conclusions
Physical mixture (heterogeneous) or Solution
(homogeneous)?
Mystery Material A
Mystery Material B
2. Use a coffee filter, the funnel, and a beaker to try to separate the mixtures from the water.
Observations
Conclusions
Mystery Material A
Mystery Material B
I think Mystery Material A may be ____________ because I know that
___________________________________________________________________________.
I think Mystery Material B may be _____________ because I know that
___________________________________________________________________________.
Use the toy parts to construct a 3-D model of each mixture that would explain the difference
between the physical mixture and the solution. Draw and label a diagram of your model below.
Mystery Material A
Mystery Material B
Exploring and Engineering Mixtures Data Sheet copyright© 2015 by USC-­‐A Data Sheet for Task 2: Mixtures and Mass
1. Create a trail mix using 3 ingredients. The sum of the mass of the ingredients before they are mixed should equal
100 grams. Mix the ingredients and measure their combined mass using the balance scale.
Ingredient #1:
Ingredient #1:
Ingredient #1:
Sum of the mass of
Mass of trail mix
_______________
_______________
_______________
all 3 ingredients
AFTER mixing
BEFORE mixing
Mass = ______ g
Mass = ______ g
Mass = ______ g
100 g
Draw a diagram that represents your findings.
2. Use the digital scale to measure the mass of 1 level tablespoon (15 ml) of drink mix. Then measure the mass of
1 cup of water. Mix the drink mix with the water. Weigh the combined mass of the solution. Don’t forget to
subtract out the mass of the containers.
Mass of drink mix:
_____g
Mass of water:
_______g
Predicted mass of solution:
_______g
Actual mass of solution:
_____________g
Draw a diagram that represents your findings.
3. Place a beaker with 200 ml water on the digital scale. Record the mass on the chart below. Now place 2 Alka
Seltzer tablets on the scale next to the beaker. Figure out the mass of the tablets and record it on the chart below.
Predict the mass of a solution of the water and the Alka Seltzer. Record it. Then put the Alka Seltzer in the water.
After it finishes fizzing, record the mass of the solution.
Mass of 200 ml water and
beaker:
_____g
Mass of 2 Alka Seltzer
tablets:
_______g
Predicted mass of Alka
Seltzer solution:
_______g
Was the mass of the solution what you predicted? Draw a diagram that explains your findings.
Exploring and Engineering Mixtures Data Sheet copyright© 2015 by USC-­‐A Actual mass of Alka
Seltzer solution:
_____________g
Data Sheet for Task 3: Concentration and Dilution
1. Label 3 clear cups with a different symbol for each. Make a key on the index card, showing which symbol stands
for 1, 2, or 3 teaspoons of drink mix. Add 100 mL of water to each cup and the corresponding number of level
teaspoonfuls in each. Trade cups with a different group. Pour a sample of each solution for each group member to
taste test in his/her personal cup. Make observations based on color and taste to determine which solution is
which. Check your answers on the index card.
Symbol
Color
Taste
Concentration (1, 2, or 3)
How does changing the amount of solute affect the concentration of the solution?
Draw a diagram that explains your findings.
2. Put 2 tsp of drink mix in each of 3 clear cups. Label one cup “100 mL” and add 100 mL of water to that cup,
stirring to dissolve the drink mix. Label a second cup “More” and, without adding more solute, find a way to make
it MORE concentrated than the first one. Label the third cup “Less” and find a way to make it LESS concentrated
than the first one without adding more solute. Pour a sample into each team member’s personal cup to taste test.
Draw a diagram to show your work. Label the amount of solute and solvent in each.
More More Concentrated
2 tsp solute
____ml solvent
Less 100mL 2 tsp solute
100 ml solvent
Less Concentrated/More Dilute
2 tsp solute
______ml solvent
Based on the observations and data collected in these two activities, list two ways to make a solution MORE
concentrated:
1. ________________________________________________________________________________________
2. ________________________________________________________________________________________
Give an example of a time when you might need to make a solution more concentrated.
__________________________________________________________________________________________
Give an example of a time when you might need to make a solution less concentrated (more dilute).
__________________________________________________________________________________________
Exploring and Engineering Mixtures Data Sheet copyright© 2015 by USC-­‐A Data Sheet for Task 4: Rate of Dissolving
Testable Question #1: How does ________________________ affect the rate of dissolving?
Hypothesis: I think ___________________will increase/decrease the rate of dissolving because I
know that ____________________________________________________________________.
Procedure:______________________________________________________________________
_____________________________________________________________________________
Manipulated-Independent variable (the only one I will change): ______________________________
Controlled variables (variables that will not change): _____________________________________
Dependent-Responding variable: the rate that the solute dissolves
I will measure the responding variable by ____________________________________________
Trial 1
Trial 2
Trial 3
Average
Conclusion: My hypothesis was supported/not supported because my results showed that
____________________________________________________________________________.
Testable Question #2: How does ________________________ affect the rate of dissolving?
Hypothesis: I think ___________________will increase/decrease the rate of dissolving because I
know that ____________________________________________________________________.
Procedure:______________________________________________________________________
_____________________________________________________________________________
Manipulated-Independent variable (the only one I will change ________________________________
Controlled variables (variables that will not change): _____________________________________
Dependent-Responding variable: the rate that the solute dissolves
I will measure the responding variable by_________________________________________.
Trial 1
Trial 2
Trial 3
Average
Conclusion: My hypothesis was supported/not supported because my results showed that
____________________________________________________________________________.
Exploring and Engineering Mixtures Data Sheet copyright© 2015 by USC-­‐A Data Sheet for Task 4: Rate of Dissolving
Testable Question #2: How does ________________________ affect the rate of dissolving?
Hypothesis: I think ___________________will increase/decrease the rate of dissolving because I
know that ____________________________________________________________________.
Procedure:______________________________________________________________________
_____________________________________________________________________________
Manipulated-Independent variable (the only one I will change): ______________________________
Controlled variables (variables that will not change): _____________________________________
Dependent-Responding variable: the rate that the solute dissolves
I will measure the responding variable by ____________________________________________
Trial 1
Trial 2
Trial 3
Average
Conclusion: My hypothesis was supported/not supported because my results showed that
____________________________________________________________________________.
Testable Question #3: How does ________________________ affect the rate of dissolving?
Hypothesis: I think ___________________will increase/decrease the rate of dissolving because I
know that ____________________________________________________________________.
Procedure:______________________________________________________________________
_____________________________________________________________________________
Manipulated-Independent variable (the only one I will change ________________________________
Controlled variables (variables that will not change): _____________________________________
Dependent-Responding variable: the rate that the solute dissolves
I will measure the responding variable by_________________________________________.
Trial 1
Trial 2
Trial 3
Average
Conclusion: My hypothesis was supported/not supported because my results showed that
____________________________________________________________________________.
Exploring and Engineering Mixtures Data Sheet copyright© 2015 by USC-­‐A Data Sheet for Engineering Mixtures: Separation Anxiety
Explore the properties of the following materials and fill in the chart below.
Particle Size
Density:
Magnetism:
Solubility:
Will it float?
Is it attracted to magnets?
Will it dissolve in water?
Salt
Powder
Iron Filings
Styrofoam
Gravel
In Ziploc bags, make 3 identical mixtures, each with the amounts in grams shown in the chart below.
Gravel
Powder
Iron Filings
Styrofoam
Starting
Amount
Salt
Use the materials in your tub to find the most efficient way to separate your mixture. Follow the
engineering design process to brainstorm procedures, design, test, and revise. As each substance is separated, place
it in one of the courtesy cups and measure its mass in grams on the digital scale. Refine the steps using your 2nd and
3rd bags of mixtures. Fill in the chart with the amounts you collect.
TEST 1
Gravel
Powder
Iron Filings
Styrofoam
Salt
Gravel
Powder
Iron Filings
Styrofoam
Salt
Gravel
Powder
Iron Filings
Styrofoam
Salt
Number order (1-5)
and method used
Amount
Recovered
Percentage
Recovered
(divide amount
recovered by
starting amount)
TEST 2
Number order (1-5)
and method used
Amount
Recovered
Percentage
Recovered
(divide amount
recovered by
starting amount)
TEST 3
Number order (1-5)
and method used Amount
Recovered
Percentage
Recovered
(divide amount
recovered by
starting amount)
Exploring and Engineering Mixtures Data Sheet copyright© 2015 by USC-­‐A Conclusion:
Draw a diagram to show the most efficient method you used to separate each substance. Number them in the
order in which you separated them.
Salt
Powder
Iron Filings
Diagram
Number order
Exploring and Engineering Mixtures Data Sheet copyright© 2015 by USC-­‐A Styrofoam
Gravel