1 / 20

The water cycle

Explore the properties of water and understand the concerns about global water shortages. Complete the water cycle activity and homework assignment, and participate in discussions on cohesion, adhesion, and surface tension.

postell
Download Presentation

The water cycle

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The water cycle

  2. The water cycle Complete the graphic organizer – 7 minutes!

  3. Water cycle activity • See handout and follow instructions • Complete the activity for HW (due tomorrow)

  4. Water Cycle – Any question?

  5. Check for understanding

  6. Check for understanding

  7. Check for understanding

  8. Think If the total amount of water on Earth does not change, why are there concerns about global water shortages? THINK BOX

  9. Thursday, October 26 Ecology - HS-LS2-4 I will be able to use the experimental design to explore the properties of water • TURN IN: • WATER SHORTAGE ACTIVITY • PALM OIL and DEFORESTATION activity • Today’s agenda: • Phenomenon • Lab: exploring water properties • Post lab questions • Mini-lecture

  10. How is this possible? How can this insect walk on water?

  11. Post lab discussion • As you were performing your experiment, what surprised you? • Why did the soap change the results of your experiment?

  12. Water is a polar molecule - + +

  13. The water molecule  NEGATIVE POSITIVE

  14. Water molecules are attracted to other water molecules: cohesion • Cohesion results in surface tension

  15. Surface tension example

  16. Water is attracted to other materials: adhesion • Water can “climb” structures

  17. Check for understanding • What is the difference between cohesion and adhesion?

  18. Check for understanding What is the difference between cohesion and adhesion? Adhesion: water is attracted to other material; cohesion: water is attracted to water

  19. Water resists change in temperature • It takes longer to change the temperature of water compared to other materials • So, Would you rather walk on sand or in water on a beach on a hot summer day?

  20. Properties of Water: summary Cohesion, Adhesion and Surface Tension cohesion = water attracted to other water molecules because of polar properties adhesion = water attracted to other materials surface tension= water is pulled together creating the smallest surface area possible https://www.youtube.com/watch?v=z5Vm56Pu4hU

More Related