Página — Uerakua Anapu Uantakua Projects And Readings 3 (pág. 161)

7. Write in your notebook the changes you see in each component of the batches:plants, eggshells, and metals. Use a table like the following one:

BUILDING AND/OR PROVING The Possible Paths

1. Discuss and agree on the following:

a) What were the results of the purple cabbage indicator compared to the hibiscus one?b) Why is it important to know the differences in the function of substances?

c) Why does water with vinegar represent acid rain?

d) What was the effect of acid rain on the materials?

e) What do the plants used in the experiment represent?

f) Were there any significant differences between adding water or using vinegar water?Why does this happen?

g) Find out what reactions you caused.

h) What changes can you suggest to improve the experiments?

2. Make your chemical reactions posters. Analyze the nature of acid-base substances, indicators, and their environmental effects.

a) Your posters must be attractive, accurate, and contain all the information needed to understand the topic.

b) Before you make your chemical reactions posters, check the information you obtained about the chemical nature of substances in the "Beginning and Observation"and "Find and Learn," and decide which you will include.

128


6. Spray the acid rain batch once a day for two weeks or until you see drastic changes.


observations	Monday	Tuesday	Wednesday	Thursday	Friday
Acid Rain
Rain


乐

160