Students learn about the physical and chemical changes that take place when juice is frozen.

 

Students will understand the chemical and physical changes of the freezing process.

 

• Students will weigh juice or other liquid.

• Students will freeze juice or other liquid. Then they will re-weigh and compare properties and weight.

• Students will discuss what physical change has taken place.

Ohio Academic Content Standards

Science
Physical Science (Grade 6)

Benchmark A:
Relate uses, properties and chemical processes to the behavior and/or arrangement of the small particles that compose matter.

Indicator:
3. Describe that in a physical change (e.g., state, shape and size), the chemical properties of a substance remain unchanged.

Science
Physical Science (Grade 4)

Benchmark A:
Compare the characteristics of simple physical and chemical changes.

Indicator:
2. Identify characteristics of a simple physical change (e.g., heating or cooling can change water from one state to another and the change is reversible).

Mathematics
Number, Number Sense and Operations (Grades 5 & 6)

Benchmark D:
Use models and pictures to relate concepts of ratio, proportion and percent.

Indicators:
Grade 5
1. Use models and visual representations to develop the concept of part-to-part and part-to-whole, and the concept of percent as part-to-whole.

Grade 6
4. Describe what it means to find a specific percent of a number using real-life examples.

5. Use models and pictures to relate concepts of ratio, proportion and percent, including percents less than 1 and greater than 100.

9. Give examples of how ratios are used to represent comparison; e.g. part-to-part, part-to-whole, whole-to-part.

Standard
Measurement (Grades 5 – 6)

Benchmark A:
Select appropriate units to measure angles, circumference, surface, area, mass and volume, using: a) U.S. customary units; e.g., degrees, square feet, pounds and other units as appropriate; b) metric units; e.g., square meters, kilograms and other units as appropriate.

Benchmark B:
Convert units of length, area, volume, mass and time within the same measurement system.

Indicator:
Grade 5
5. Make conversions within the same measurement system while performing computations.

Materials

• Fruit juice

• Ice cube trays or similar containers

• Accurate scales

• Popsicle sticks or sucker sticks (optional)

• Disposable plastic food for sanitary purposes

Procedure

1. Wash the ice cube trays.

2. Have the students weigh the ice cube trays and popsicle sticks separately.

3. Pour juice into the ice cube trays and have the students weigh them again. Remind them to subtract the weight of the ice cube trays.

4. Freeze the juice until it is half-set and then put sticks into each cube, if desired. Continue freezing until the juice is completely frozen.

5. When completely frozen, have the students weigh the trays again. Remind them to subtract the weight of the ice cube trays and popsicle sticks for final results.

6. Once they are finished, they can eat the popsicles!

7. Have students write out the process they used, and what they discovered.

   Note: If the ice cube trays are too big to weigh on the scales, use a separate container to weigh the juice. Weigh the container first then weigh the container with the juice. Remember to subtract the weight of the container from the results to get the weight of the juice.

Evaluation

Evaluate students’ performance using the Fruit Juice Popsicles rubric.

 

Rubric: Fruit Juice Popsicles