ࡱ> dfca jbjb,, $$NNZBBBBV$Z "!!!!!!!,#R=&!!!.!48"!V @l!z f6B ! l!!0 "!T&&l!ZZ D ZZ Lava Lamp Lesson Plan Date: November 26, 2012 Grade/Level: ANY Subject: Science (Physical) Time: 60mins No. of Students: 15 Lesson Overview: Students make a simple yet spectacular lava lamp using colored water, vegetable oil and a soluble aspirin tablet. They write an instruction manual with diagrams and a scientific explanation of the observed effect. Whole class Introduce and discuss lesson (10 15 min) Small Groups Make and observe DIY Lava Lamps (15 20 min) In small groups, students make and carefully observe a lava lamp. You may wish to photograph and video the procedure for the school newsletter or website Whole class Class discussion (5 15 min) Discuss the activity and any extension activities. Individual Write a DIY Lava Lamp Instruction Manual(15/20 min) Students write and illustrate an instruction manual providing a scientific explanation of the theory of operation. Objectives: Students will: Predict whether oil and water will mix in a glass Predict and carefully observe how a drop of food color behaves in vegetable oil and water Predict and observe how a soluble aspirin tablet behaves in vegetable oil and water Compare their predictions with observations Record their observations Concepts: Vegetable oil and water do not mix substances which do not dissolve in each other are immiscible Vegetable oil floats on water because it is less dense Aspirin (acetyl salicylic acid) is a mild acid Soluble aspirin tablets also contain a mild base which reacts with the acidic aspirin when dissolved together in water to form bubbles of carbon dioxide gas The chemicals in soluble aspirin tablets do not dissolve in, and therefore do not react in, vegetable oil Content Standards: Science California Content Standards - Investigation and Experimentation TPE # 5: Student Engagement- Model effective communication skills (i.e. grammar, spelling, handwriting, vocabulary, rate of speech, and voice quality). Ensure the students understand what they are to do during instruction. Materials: *vegetable oil *water *food coloring * alka-seltzer tablets *bottles *funnel Anticipatory Set: Conduct Standards: Respect yourself, respect others, respect community. Discuss Whole Class: Introduce and Discuss-(5-10mins) Ask students to predict what will happen at each step ie: Will the oil and water mix? How will a drop of food color behave in oil? Will the soluble aspirin tablet float or sink in the oil and how else might it behave? Assign group jobs and distribute materials required Make and Observe DIY Lava Lamps: (20-25mins) *Students will predict is substances will mix with water. Group members cooperate to make a Lava Lamp each group member should have a turn at adding one of the ingredients to glass: 1/4 fill glass with water Carefully add vegetable oil until glass is near full Add two or three drops of food coloring and observe Add soluble aspirin tablet and observe Discuss ideas about how the lava lamp works * All groups work together to CLEAN UP Discussion- Whole Class- (5-10mins) Discuss the activity and observations *Talk about the property difference between water and oil. They are both liquids but they vary considerably. As a good scientist its good to understand what the properties are of the materials you are working with. *Oil is less dense then water, this is why its above the water. * Where does the food coloring settle why is this? * Alka Seltzer is a combination of sodium bicarbonate, aspirin and a citric acid. The hydrogen reacts with the bicarbonate to produce carbon dioxide, which appears as bubbles. * The gas bubbles rise up and take some food coloring and water with them to the surface. Once all the gas bubbles have escaped then the water and oil separate again. Discuss how to approach writing and illustration of instruction guide students could design a one page illustrated instruction sheet or poster. 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