Lesson 4 Materials:

Per Class

• Hot water (49-55℃)

• enough for 400 mL (200 mL in each cup) per group of students

• class data table for temperature and mass change

• whiteboard or chart paper

• Calculating Mean anchor chart

• 1 16-oz single-wall plastic cup of water with no lid

• Slow-motion Video Steam  Evaporation - 6.2 Thermal Energy Lesson 4.mp4

• Time-lapse Water in a Glass - 6.2 Thermal Energy Lesson 4.mp4

• Markers

• Optional: 15 blue circular magnets

• Optional: 4 yellow circular magnets

Per Group

• Plastic beaker

• 2 16-oz single-wall plastic cups

• 1 clear plastic lid

• 1 plastic straw

• 2 thermometers

• Timer

• 1 digital scale (accurate to +/- 0.1 g)

• Copies of Manipulative Mat for a Model of Matter at the Surface of the Liquid

• Bag of 19 blue chips (for every 2 students)

• Bag of 4 yellow chips (for every 2 students)

Per Student

• science notebook

• markers

• Safety goggles

• Calculator (as needed)

Prep

Review 

• Lesson Plan

• Slides

Prepare

• Students need access to the Lesson 3 pages of their science notebook containing their agreed-upon procedures for investigating the lid as an independent variable.

• Make a class data table on chart paper for pooling data across groups for both temperature change and mass change. (There is a digital copy available, also) 

• Make an anchor chart describing how to calculate a mean. (see below) Students will refer to this chart in your classroom from this lesson forward.

• For every 2 students, make a bag of 19 blue chips and a separate bag of 4 yellow chips. If chips are unavailable, substitute another round object, such as paper dots, beads, or coins. You will need two different kinds (e.g., pennies and nickels, blue and yellow beads).

• Test the videos of evaporation ahead of time (one is time-lapse and one is slow-motion):

• Be sure you have materials ready to add the following words to the Word Catcher Wall:  evaporation, open system & closed system. Do not post this/these word(s) on the wall until after your class has developed a shared understanding of its/their meaning.

• Cup Lid Lab

  • Group size: 3

  • Setup: Fill an electric kettle ¾ full. Heat water in electric kettles to 49-55℃, enough water so that every group of students gets 400 mL (200 mL in each of their 2 cups). After heated, add cool tap water to fill the kettle. 

  • For every group of students, prepare a bin containing these lab materials: plastic beaker, 2 16-oz single-wall plastic cups, 1 clear plastic lid, 1 straw, 1 digital scale (accurate to +/- 0.1g)

• Safety: Make sure your water is not above 55℃. Most adults will suffer third-degree burns if exposed to 65℃ water for two seconds. Burns will occur with a six-second exposure to 60℃ water or a thirty-second exposure to 55℃. Students should wear safety goggles throughout this lab.