Observing Water Evaporation: A Slow Action Experiment

🌡️Water evaporation can be observed through a simple experiment using glass jars and sunlight.

🔆Sunlight plays a crucial role in evaporation as it provides the energy needed to convert liquid water into vapor.

🌡️The jar without a lid experiences greater water evaporation compared to the jar with a lid, demonstrating the impact of air exposure.

📝Recording predictions and observations in a journal helps develop scientific thinking and analysis skills.

🌡️Water evaporation is an essential part of the water cycle, contributing to cloud formation and precipitation.

What materials are needed for the experiment?

—The experiment requires two glass jars, water, a dry erase marker, and sunlight.

How long should the jars be left in sunlight?

—The jars should be left in sunlight for at least 24 hours.

What should be done before placing the jars in sunlight?

—A line should be drawn on each jar at the water level using a dry erase marker.

What happens if it rains during the experiment?

—It is important to ensure that it won't rain during the 24-hour period as rain can affect the experiment results.

Why is it important to record predictions and observations?

—Recording predictions and observations helps develop scientific thinking and analysis skills and provides a reference for future analysis.

00:00Introduction to the Water Evaporation in (Slow) Action Experiment from Lesson 7 of the Weather and Water science unit.

00:22Setting up the experiment with two glass jars, one with a lid and one without, and marking the water level on each jar.

00:54Placing the jars in a sunny windowsill or outside for at least 24 hours.

01:03Prompting viewers to write or draw predictions of what will happen in each jar based on their understanding of evaporation.

01:28Announcement that the jars will be left undisturbed for 24 hours.

01:35Returning to observe the jars after 24 hours and discussing the difference in water levels and the concept of evaporation.

01:58Encouraging viewers to fill in the Results section of their journal with observations and any additional details.

02:03Closing remarks and gratitude for joining the experiment.