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Aquatic Environments Investigation 4

Purpose:. Observe an aquarium environment over time and keep a record of changes in a journal.Identify and monitor some of the environmental factors in a freshwater environment.Relate the observed difference in the acidity of aquariums to the amount of carbon dioxide produced by the organisms in t

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Aquatic Environments Investigation 4

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    1. Aquatic Environments Investigation 4

    2. Purpose: Observe an aquarium environment over time and keep a record of changes in a journal. Identify and monitor some of the environmental factors in a freshwater environment. Relate the observed difference in the acidity of aquariums to the amount of carbon dioxide produced by the organisms in the aquariums. Use scientific thinking processes to conduct investigations and build explanations: observing, communicating, comparing, organizing, and relating.

    4. Aquarium An aquatic environment; a tank for keeping live water plants and animals

    12. Demonstrating BTB BTB is a chemical used to test water. Let’s find out what happens when a few drops of BTB are added to aged (conditioned) tap water.

    13. Put one 5-ml spoon of aged or treated tap water in a clean vial. Add 2 drops of BTB, put the cap on, and swirl to mix. Observe.

    17. Introducing the Concept of Indicator It is important to know the amount of acid in the aquarium water because too much acid will hurt the fish and other living organisms.

    19. Three different water samples Measure 5ml of the appropriate water into each vile. Put 2 drops of BTB in each vile. Cap and swirl vials.

    20. Investigation

    23. Carbon Dioxide and Acid Both fish and humans exhale a gas called carbon dioxide (CO2). The carbon dioxide combines with water to form carbonic acid.

    25. Why do you think the carbon dioxide level of the plant water is changing?

    26. Indicator- a chemical used to test the presence, absence, or amount of substance in a materials

    27. Carbon dioxide- colorless, odorless gas, present in the atmosphere…It is released by animals and plants during respiration

    28. Content/Inquiry

    30. Part 3 New Organisms What could we do to the beta aquarium to make it more diverse and interesting? Enrich the Aquatic Environment Make Journal Entries

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