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Observing Crystals: Investigating Mixtures and Solutions Through Evaporation

In this hands-on investigation, students collect their group's dishes from the evaporation tray and observe the salt crystals formed after the evaporation of saltwater. Using a hand lens, they examine the shape and pattern of the crystals. Students will answer questions related to the evaporation process, the material left behind, and similarities or changes in the salt's appearance. By understanding the concepts of evaporation and crystal formation, students develop a deeper inquiry into the properties of mixtures and solutions.

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Observing Crystals: Investigating Mixtures and Solutions Through Evaporation

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Presentation Transcript

  1. Mixtures and Solutions Investigation 1 Part 3 Observing Crystals

  2. Getters: • Collect your group’s dish from the evaporation tray • Collect your group’s bin

  3. Observations • Look at the salt crystals with your hand lens. • What shape do you see? • What pattern do you see?

  4. Questions • What happened when the saltwater solution evaporated? • What is the material in the dish? • What happened to the water that was in the mixture? • Does the salt look the same as it did originally?

  5. Word Bank • EvaporationThe process of a liquid turning to gas and dispersing into the air, leaving any dissolved solid material behind.

  6. Word Bank • CrystalThe solid form of a material that can be identified by its natural shape or pattern.

  7. Content/Inquiry • When a solution evaporates, it leave the dissolved solid material behind.

  8. Content/Inquiry • If the evaporation material forms a crystal, it can be identified by its properties, such as shape and pattern.

  9. Getters • Put the dishes back in the evaporation trays. • Put your bin back • Grab two books for your group to share.

  10. Turn to Page 7 • Let’s read “A Salty Story”

  11. Homework • None

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