i-Tree Unit Lesson 2: Evaporation Lab


Activity Description: 

At the conclusion of Lesson 1: Water Cycle & Weather, students were asked the question: “How does temperature affect evaporation?” Students review the water cycle and how it affects the weather, conduct the evaporation lab and describe the factors that affect evaporation.

Educational Standards: 

Next Generation Science Standards:

MS­ESS2­4: Develop a model to describe the cycling of water through Earth's systems driven by energy from the sun and the force of gravity.

Common Core:

CCSS.ELA ­LITERACY.RST.6­8.7: Integrate quantitative or technical information expressed in words in a text with a version of that information expressed visually (e.g., in a flowchart, diagram, model, graph, or table).

Pre-Activity Prep: 
  • Set up stations with, and without, clamp lights and scales throughout the classroom
  • Fill each of the beakers with water
  • Provide paper towels at each station in case of spills
  • Label the station with the lights “A” and the station without the lights “B”
  • Lay out thermometers to calibrate to the same temperature

Evaporation lab slideshow

Lab Materials (per group)

  • 2 petri dishes
  • 2 Thermometers
  • 1 Clamp light
  • 1 incandescent heat bulb
  • 2 droppers
  • 2 liters water
  • 2 digital scales
  • 2 200ml beakers
  • Water
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