Unit 21- Liquids
Liquids
Focus Areas: Properties of Liquids, Liquid Sandwich, Floating and Sinking, Submarine Working
At the end of this unit, students are expected to:
- Understand the properties of liquids (color, smell, taste, transparency, density, solubility).
- Explore the principles of floating and sinking, and relate these to density and buoyancy.
- Learn the working principle of a submarine and how it controls buoyancy.
- Engage in physical activities related to water and teamwork.
- Develop mathematical skills in comparing values using greater than ( > ), less than ( < ), and fractions.
Materials
- Transparent containers (e.g., jars or beakers)
- Various liquids (e.g., water, oil, honey, vinegar)
- Food coloring
- Salt, sugar, and other solutes
- Small objects of different densities (e.g., plastic, wood, metal)
- Balloons, syringes, and small plastic bottles (for the submarine experiment)
- Towels, plastic sheets, and water-friendly materials for physical activities
- Worksheets with mathematical problems
Activity 1: Density
Exploring the Properties of Liquids (Science)
Objective: Investigate and compare the properties of different liquids.
- Provide students with different liquids (e.g., water, oil, vinegar, honey).
- Students observe and record each liquid’s properties: Color, Smell, Taste (if safe, like saltwater or sugar water), Transparency, and density (e.g., layering liquids to create a "liquid sandwich").
- Conduct experiments to explore solubility by mixing solutes like salt and sugar into water, oil, or vinegar.
Activity 2:
Floating and Sinking (Science)Objective: Learn about density and buoyancy through hands-on experiments.
- Fill transparent containers with water.
- Provide objects of varying densities (e.g., plastic, wood, metal).
- Students predict which objects will float or sink, test their hypotheses, and discuss the results.
- Relate the observations to density: Objects with lower density than water float. Objects with higher density sink.
Activity 3: Liquid Art Photography and Digital Enhancement
Objective: Students will create artistic arrangements using glasses filled with colored liquids, photograph their creations, and enhance the images using a mobile app.
Materials: Previously used: Clear glasses or transparent containers, Various liquids (water mixed with food coloring). New: Smartphones or tablets with cameras. A mobile app for photo editing (e.g., Picsart)
Instructions:
- Artistic Creation: Divide students into small groups. Provide each group with clear glasses and colored liquids. Instruct them to create an artistic arrangement by varying the colors, heights, and positions of the glasses.
- Photography: Once the arrangements are complete, students use smartphones or tablets to photograph their creations from different angles.
- Digital Enhancement: Introduce students to a user-friendly photo editing app like Picsart. Demonstrate basic editing features such as filters, cropping, and adjustments. Allow students to enhance their photos, emphasizing creativity and the use of various effects.
- Presentation: Have each group present their original and edited photos to the class, discussing the choices they made during the editing process.
Activity 4: Submarine Principle (Engineering)
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Basic Version
Complex Version
Activity 5: Physical Education – Water-Themed Games
Objective: Engage in fun, water-based activities to reinforce teamwork and coordination.
- Swimming Duet: Teams pair up to coordinate swimming or water movements in sync.
- Extra-Long Swimmer: Groups link arms or legs to “swim” together across a shallow pool or water area.
- Wet T-Shirt Race: Relay where students must put on a wet t-shirt, run to the other side, and tag the next teammate.
- Carry the Baby!: Teams carry a small floating object (e.g., a “baby”) across a pool without dropping it.
- Octopus Race: Teams race while holding onto a long floating object (e.g., a pool noodle) to simulate an octopus.
Activity 6: Mathematical Relationships – Greater, Less, and Fractions (Math)
Objective: Use the properties of liquids to solve math problems involving comparisons and fractions.
- Comparisons: Arrange liquids by density (e.g., water < honey > oil). Create problems like: "Is the density of oil greater than or less than water?"
- Fractions: Divide liquids into parts (e.g., 1/4 cup of water, 3/4 cup of oil) and compare. Ask students to express the relationship as fractions (e.g., “Oil is 3/4 full compared to water, which is 1/4”).
- Worksheet Tasks: Compare quantities of solutes dissolved in water (e.g., “Salt in water > Sugar in water”). Create word problems involving fractions and the density of liquids.
STEPAM Components
- Science: Investigate liquid properties, density, and buoyancy.
- Technology: Use videos or interactive simulations to visualize floating, sinking, and submarine principles; Use mobile app for picture creation and modification.
- Engineering: Build a model submarine to demonstrate buoyancy control.
- Physical Education: Participate in water-themed games to reinforce teamwork and coordination.
- Art: Creating colorful liquid arrangements and photographing them to produce artistic works.
- Mathematics: Solve problems involving comparisons, fractions, and mathematical relationships using liquid properties.
