1 / 23

Earth’s Waters Earth The Water Planet

Earth’s Waters Earth The Water Planet. How important is water? Integrating Chemistry: The Properties of Water The Water Cycle. Section 1 How is water important?. What would a world be like with out Water ? BP Water Supply How Do People Use Water? (refer also to pg. 17 margin )

izzy
Download Presentation

Earth’s Waters Earth The Water Planet

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. Earth’s Waters Earth The Water Planet How important is water? Integrating Chemistry: The Properties of Water The Water Cycle

  2. Section 1 How is water important? • What would a world be like with out Water? • BP Water Supply • How Do People Use Water? (refer also to pg. 17 margin) • Give Examples:

  3. Section 1 How is water important? • Agriculture—growing crops • Irrigation: the process of supplying water to areas of land to make them suitable for growing crops. • **In the US more water is used for irrigating farmland than for any other single purpose!!!!!!!!!!!! • BrainPop Agricultural Revolution • pg. 18 Science and History

  4. Section 1 How is water important? • Industry--making products • Give an example of how water is used in making paper… • Any other examples you can think of…

  5. Section 1 How is water important? • Transportation-moving things from one place to another • Give examples of how water is used in transportation • See map of cities. MAP CLICK HERE • Where do you notice large are located?

  6. Section 1 How is water important? • Recreation- • What types of recreation activities is water needed for: • What to do in Southern IL

  7. Section 1 How is water important? • Water and Living Things • Riddle: What do you and an apple have in common? • Water makes up nearly 2/3rds of your body • Water is essential for living things to grow, reproduce, and carryout other important processes!!!!! • BrainPop Photosynthesis • Photosynthesis: plants use water carbon dioxide and suns energy to make food. • Why is photosynthesis important to us?? • Habitat: the place where organisms live which provides the things it needs to survive. • Examples of water habitats

  8. Section 1 How is water important? • Water on Earth • Water covers ________ of the Earth's surface. • Most of Earth's water--more than 97%--is salt water that is found in the oceans. • See fig 3 pg. 20 • Figure 5 pg. 22 • Groundwater: water that fills the cracks and space in underground soil and rock layers.

  9. Section 2: The Properties of H2O • BP Water • Water's Unique Structure •  Water is made of Atoms • 2 H (hydrogen atoms) + 1 O (oxygen atom)= H2O (water) • H2O is the chemical formula for water • Figure 6--discuss arrangement of atoms

  10. Section 2: The Properties of H2O • Polar molecule: a molecule that has electrically charged areas • Polar molecules are like magnets; attracting "opposite ends" • **The positive hydrogen ends of one water molecule attract the negative oxygen ends of nearby water molecules. • As a result, the water molecules tend to stick together. • Water's unusual properties occur because of polar molecules.

  11. Section 2: The Properties of H2O • Surface Tension • surface tension: the tightness across the surface of the water that is caused by the polar molecules pulling on each other. • Examples of surface tension: • Water strider bug (figure 7) • Raindrops form to round beads

  12. Section 2: The Properties of H2O • Capillary Action • capillary action: combined force of attraction among water molecules and with the molecules of surround materials. • Allows water to move through materials with pores or narrow spaces inside.

  13. Section 2: The Properties of H2O • Water the universal solvent • What happens when you make lemonade from a powder mix? • Solution: A mixture that forms when one substance dissolves another. • Solvent: Substance that does the dissolving. • Ex. Water is a solvent

  14. Section 2: The Properties of H2O • *One reason that water is able to dissolve many substances is that it is polar. • *The charged ends of the water molecule attract the molecules of other polar substances. • Ex. Sugar (cube in hot tea) • "Universal solvent"- Water can dissolve many substances. • Some substances it can dissolve: salt, soap, bleach, rubbing alcohol, oxygen, CO2 • Does not dissolve: oil and wax (non polar) • Non-polar does not dissolve well in H2O.

  15. Section 2: The Properties of H2O • Changing State • State: A form of matter; solid, liquid or gas • The ice is a solid, the water is a liquid, and the water vapor in the air is a gas. • Water is the only substance on Earth that exists in all states. • Melting: Changing from solid to liquid, molecules in liquid start moving faster.   • Evaporation: Process by which molecules at the surface of a liquid absorb enough to change to the gaseous state. • Condensation: Process by which a gas changes to a liquid • Figure 9 • Freezing: Molecules continue to lose energy to the point of forming a solid.

  16. Section 2: The Properties of H2O • Why Ice Floats • Less dense as a solid, than a liquid • Why is this so important?

  17. Section 2: The Properties of H2O • Specific Heat • Specific heat: The amount of heat needed to increase the temperature of a certain mass of a substance by 1 degree Celsius. • Water has a high specific heat due to the attraction between H2O molecules • Ex. It takes a long time for Lake Michigan to freeze in winter and a long time to warm up over summer. • Keeps some climates more regulated • Ex. Chicago

  18. Section 3: The Water Cycle • Water Cycle: the continuous process by which the water moves through the living and nonliving parts of the environment.

  19. Section 3: The Water Cycle http://ga.water.usgs.gov/edu/watercyclefreshstorage.html

  20. Section 3: The Water Cycle • Water Evaporates • Transpiration: water that is given off by the leaves of plants as water vapor http://ga.water.usgs.gov/edu/watercycletranspiration.html

  21. Section 3: The Water Cycle • Clouds form • Condensation: water vapor that collects and forms droplets. http://ga.water.usgs.gov/edu/2010/gallery/condensation-clouds.html

  22. Section 3: The Water Cycle • Water Falls • Precipitation: water droplets that have condensed become heavy enough that they fall http://ga.water.usgs.gov/edu/watercycleprecipitation.html

  23. Section 3: The Water Cycle

More Related