Understanding the Water Cycle: Does Liquid Water Ever Disappear?
Explore the concept of whether liquid water ever disappears through an engaging lesson that involves predictions, observations, and building a scientific explanation. Students will investigate changes in water levels, make claims supported by evidence, and discuss the processes involved in the water cycle.
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Presentation Transcript
WATER CYCLE LESSON 1A Does Liquid Water Ever Disappear?
Unit Central Questions How does water change in the world around us? Does Earth ever run out of water?
Todays Focus Question Does liquid water ever disappear? Explain your thinking.
Water Changes: Predictions Draw and label a diagram of the beaker of water and the hot plate. Be sure to mark the water level on your drawing! Write your predictions in your notebooks: I predict the water level will My reason is
Water Changes: Observations Draw and label a new picture of the beaker of water to show what you observed. I saw I noticed that
Building a Scientific Explanation: Why Did the Water Level Go Down? A scientific explanation includes three things: 1. A claim: A statement that answers the question. 2. Evidence: Observations that support the claim. 3. Reasoning: A statement using science ideas and principles to explain why the evidence supports the claim.
Writing a Claim Question: Why did the water level go down? Write a sentence that answers this question. This is your claim.
Supporting a Claim with Evidence Question: Why did the water level go down? Claim: The water level went down because some of the water went into the air. Do we have evidence to support this claim?
Todays Focus Question Does liquid water ever disappear? Explain your thinking.
Lets Summarize! Do we have a complete scientific explanation for why the water level in the beaker of boiling water went down? Explain your thinking.
Next Time A good science explanation has a claim, supporting evidence, and logical reasoning. Today we developed a claim about why the water level went down in the beaker of boiling water. Then we provided evidence to support this claim. Tomorrow we ll learn some science ideas that will help us finish our explanation with good scientific reasoning.
