Sub Unit Activities Inquiries, Inquiry Questions And Data Analysis (MAAK)

Acidity
1. Introductory Lecture-
• Explain to whole class what acidity is
• Tell them the difference between bases, neutrals and acids

2. Cabbage Juice Experiment:
• Students will conduct an experiment using cabbage juice as a neutral for other acidic and non acidic substances
• Experiment will take one, thirty minute class period
• Students will take blended cabbage juice and add other substances to it to determine acidity
• The substances that are available to students are lemon juice, diet soda, regular soda, milk, energy drink, baking soda, laundry detergent, vinegar, and rubbing alcohol
• Students will have a journal where they keep a log of what changes colors and what did not. They will also use colors to show what each substance changed the purple cabbage juice to.
• Have students discuss at the end which liquids are acidic and which ones are not

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3. Acidity in Liquids Activity
• Students will conduct an experiment using 3 different liquids and 3 different materials
• Experiment will go over a three week time period
• Students will submerge materials into different liquids in small clear cups
• The three liquids that students will use are milk, soda and water
• The three materials that students will use are bones (chicken), meat (beef) and pennies
• Students will place each material in a separate cup then submerge each material into 3 different liquids
• Before conducting experiment, students will break into pairs
• Each pair will have to make a hypothesis as to what will happen to each material
• Students will then record observations over the three week time period
• Students will keep a journal with hypothesis, observations, and eventually end results.
• Students will also draw what changes they see in the materials
• At the end of the three weeks, students will gather and analyze results of the experiment
• Have discussion at the end of three weeks to talk about results

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4. Acid Rain Exploration
• Introductory lecture on how acid rain is created, how if effects food/people/plants
• Break students into small groups of about 2-3
• Students will then research acid rain in specific states
• Each group will be given a state that is known to have moderate-high levels of acid rain
• Students will need to find out what crops are grown here, how much acid rain is present, how it affects the crops, who it might affect, and what is done to help with the problem
• Each group will then give a short presentation to the rest of the class about their state
• Each groups presentation will last about 2-3 minutes
• Each group must have supplementary materials such as a poster, charts, graphs, etc…
• After everyone has presented, have class discussion about interesting facts, questions, surprises, etc…
• Activity should take one, sixty minute period in order to do research and presentations

Questions:
• What are acids?
• What are bases and neutrals?
• How do acids affect certain materials?
• What liquids are acidic?
• What substances are non-acidic?
• Why do substances differ in acidity?
• What does acid do to our food?
• How is acid rain formed?
• What states have the most acid rain?
• How does acid rain affect crops?

Techniques:
• Observation
• Research on computer
• Prior knowledge

Return to Exploring Acids with MAAK (Unit Plan)

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