Question:
What happens to the pollution of Tietê when its water evaporates and clouds are formed?
Hypothesis:
Objective:
Investigate the water cycle and recognize the physical changes involved.
Materials:
Beaker, water, watch glass, heating grid, Bunsen burner, ice, pipette, tripod and food coloring.
Procedures:
- Put 50mL of water in a beaker.
- Add 8 drops of food coloring to the water in the beaker.
- Collect a sample of this water with the pipette and transfer it to the laboratory sheet (results).
- Cover the beaker with the watch glass and place an ice cube on top of it.
- Heat the system with the aid of the tripod, heating grid and Bunsen burner.
- Take a sample from the bottom of the watch glass and transfer it to the lab sheet (results).
Results:
Discussion (IN PAIRS):
Answer the following questions in a text:
- Which physical state changes happened in the experiment? Explain each one.
- Which energies were involved in each change? Why?
- Where did the energies go to?
- What happened with the food coloring? Explain.
- What happened under the watch glass? Explain.
CONCLUSION (IN PAIRS):
Answer the following questions in a text:
- Compare your experiment with the water cycle in the nature. What processes were represented in the experiment? Why?
- Was your hypothesis correct? If your answer is yes, what did you do in your experiment that confirm your answer? If not, how does the experiment answer it correctly?
- What is the answer to the question that started our investigation?