November 18, 2009

The seeds are growing in the ecocolums and the students look forward to the next adventure. Thanks for the contributions of the bottles. We have studied acids and bases with some fun experiments. Now it is test time.

Test Time:

Study Chapter 5 for an upcoming test. Know everything on pages B 68- B 69 and the following data:

Map the Concept: Know 3 types of symbiotic relationships:
Parasitism- one organism benefits, another is harmed
Commensalism-one organism benefits, another is not affected
Mutualsm-both organisms benefit

Acids and Bases

Recognize that red(purple) cabbage juice as a common indicator turns bright pink in the presence of an acid and green or yellow in the presence of a base.

Recoginze that grape juice turns deep red in the presence of an acid and blue in the presence of a base.

Recognize that the color of black tea becomes lighter in the presence of an acid and darker in the presence of a base.

Recognize the characteristics of common items as indicatorscontained in acids like citrus fruits, vinegar, and carbonated cola soft drinks, as well as common bases like a bar of soap, ammonia, baking soda, and antacids.

Listen to the audio about acids and bases.