Earth Science · Matter & Energy

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01Learning Objectives
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Pre-Lab Safety

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02Standards
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03Materials · per group of 3
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04Lesson Arc · 45 Minutes
Phenomenon Predict Investigate Model Exit
0:00–0:06
6 min
Phenomenon Hook
TeacherHold up a cold soda can that's been in the cooler. Ask: "Where did this water on the OUTSIDE come from? The can is sealed — so it can't be leaking." Take a few competing ideas, write them on the board, don't confirm.
StudentsJot a first explanation in the notebook, then share with an elbow partner. Notice the puzzle: water appears where there was none.
0:06–0:14
8 min
Make a Prediction
TeacherSet up the test: an ice-water metal cup and a room-temp cup side by side. Ask: "On which cup will water form, and why? Predict at the molecule level." Show the particle-motion animation: warm air = fast molecules.
StudentsWrite a prediction with a reason ("I think ___ because ___"), referencing whether molecules near the cup speed up or slow down.
Guiding question What happens to air molecules when they touch a very cold surface?
0:14–0:28
14 min
Investigate · Hands-On Test
TeacherDistribute trays. Circulate with probing questions: "Which cup is sweating? Touch the droplets — where is that water coming from, the inside or the air?" Have groups record the cup temperatures.
StudentsFill the metal cup with ice water, wait 3 minutes, and observe both cups. Record: which cup formed droplets, the temperature of each, and where on the cup the water collected.
0:28–0:38
10 min
Build the Molecular Model
TeacherLead the reveal: "Air holds invisible water VAPOR. The cold cup pulls energy out of nearby molecules — they slow down and clump into liquid: condensation." Model the before/after drawing on the board.
StudentsComplete the before/after model: fast, spread-out gas molecules → slow, close-packed liquid molecules, with an arrow labeled "loses energy / cools." Write one sentence tying it to the can.
0:38–0:45
7 min
Exit Ticket & Closure
TeacherConnect it back: "This is the same reason clouds and morning dew form." Distribute the exit ticket and remind students to use the word "energy" in their answer.
StudentsComplete the exit ticket independently, then revise their original board idea if the evidence changed their mind.
05The Model Students Build
Before · Water Vapor (gas)
Fast & far apart
High energy molecules bounce freely with lots of space between them.
After · Liquid Water
Slow & close-packed
Cooled molecules lose energy, slow down, and clump together as a droplet.
06Exit Ticket
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07Differentiation & Extensions

+Supports

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↗Extensions

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