Objective: By the end of the lesson, students will be able to define evaporation and identify how it occurs in nature.

Materials:

• Large sheets of paper
• Aluminum foil
• Scissors
• Water
• Bowl
• Pen/Pencil

Introduction (10 minutes)

1. First ask students to make a list of objects in their environment that are wet (e.g. raindrops, a lake, the ocean, wet pavement).

2. Ask students to explain why the objects are wet (e.g. from rain).

3. Tell students that we are going to explore what happens to the water from raindrops and other wet objects when it evaporates.

4. Ask students what they think ‘evaporate’ means and write down any ideas on the board.

Evaporation Experiment (20 minutes)

1. Divide the class into groups of 4-5 students.

2. Give each group a sheet of paper, aluminum foil, scissors, and a container of water.

3. Instruct each group to cut the paper into rectangles and place them in the aluminum foil.

4. Ask the students to pour some water over the papers and wrap the aluminum foil over the top.

5. Instruct the students to place the bowl of water outside under the sun and watch what happens over the next 10 minutes.

Discussion/Conclusion (10 minutes)

1.After 10 minutes, ask each group to share what happened in their experiment.

1. Explain that during the experiment, the water was heated by the Sun and changed from a liquid to a gas, which is called evaporation.

2. Summarise the lesson by explaining that evaporation is the process by which water moves from a liquid to a gas and returns to the atmosphere.

3. Invite any questions or comments about the experiment.