Prior knowledge: students will be able to describe physical properties including density, and recognize solids and liquids. A 2-day lesson plan.
SWBAT describe physical changes.
Hot plate, pan, chocolate chips, wooden spoon; candles, scissors, pizza Lunchable, plastic cup, pitcher of water, kool-aid powder, white scrap paper, crayon, aluminum foil.
| Time||Learning Task ||Methods/Procedures |
| DAY 1|| || |
| 8 min|| Review density/Activate prior knowledge about phase changes. Answer: Predict what will happen when chocolate chips are released into a pot of melted chocolate.||Bellwork, pair share |
| 2 min|| Observe that chocolate chips sink in the melted chocolate.|| Teacher-led demonstration |
| 10 min||Explain why the chocolate chips sunk in the melted chocolate, and give other examples of solids sinking in fluids (solids are generally more dense than liquids). ||Class discussion/guided notes |
| 10 min|| Return to the pot of chocolate, and try to find the chocolate chips we put in the pot earlier. Debate whether they are gone, or a different substance. Conclude that they are still there, and are still the same substance as before, but experienced a phase change (teacher defines phase change and describes the different types).||Teacher-led questioning |
| 5|| Give examples of other phase changes in everyday life|| Think-pair-share |
| 5|| Categorize examples as melting, freezing, vaporizing, condensing, sublimating.|| Guided practice (as class, then in pairs) |
| 5|| Assess/close: True or false? A phase change results in a new type of matter. Categorize several examples of phase changes as melting, vaporizing, etc.|| Whiteboard quiz |
| || HW--Complete categorization of phase changes begun in class (independent practice).|| |
| DAY 2|| || |
| 10|| Review/Assess LP1 and LP2|| Quick Quiz |
| 10|| Using physical properties graphic organizer from LP1, brainstorm other possible types of physical changes besides changing the phase. (Change in shape, size, texture, malleability, conductivity, appearance, etc.)|| Think-pair-share |
| 20|| Observe various physical changes: Chocolate from yesterday re-hardening in pot, cutting a candle into pieces, crumpling up a piece of foil, mixing kool-aid powder and water, coloring a piece of paper with a crayon, making a Lunchable pizza.||Lab rotation around room in pairs. |
| 5|| Assess/close: Describe four physical changes a glass of milk could undergo.|| Exit card |
Whiteboard quiz (day 1), exit card.
Benchmark or Standards:
TEKS 6.2B, 6.7B