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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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1. Aquatic EnvironmentsInvestigation 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