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WATER for LIFE

WATER for LIFE. The Unique Properties of WATER What unique properties of water make it essential for LIFE on Earth?. 1. I can use and develop models to describe the atomic composition of simple molecules. Draw and label models of the elements- Hydrogen and Oxygen (label p, n, e ,)

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WATER for LIFE

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  1. WATER for LIFE The Unique Properties of WATER What unique properties of water make it essential for LIFE on Earth?

  2. 1. I can use and develop models to describe the atomic composition of simple molecules . • Draw and label models of the elements- Hydrogen and Oxygen (label p, n, e,) • Draw and label a molecule of water. (label-H, O, covalent bond, partial + and – charges) • Explain polar molecule- Molecules that have a region with a slight positive charge and a region with a slight negative charge on opposite ends of the molecule. The polarity of water cause many of the unique properties we observe!

  3. 2. I can illustrate the structure and intermolecular forces of the water molecule in relation to hydrogen bonding. • Draw and label several molecules of water including hydrogen bonding. • Hydrogen bonding- The electrostatic attraction between the slightly positive H atoms and the slightly negative O atoms in the water molecule. Opposite charges attract!

  4. 3. I can explain the role of hydrogen bonding and its relationship with some of the unique characteristics of water. • List and explain 3 properties of water related to hydrogen bonds • Adhesion- • The attraction among molecules of different substances. WATER STICKS to OTHER things. • Examples: • Cohesion- • The attraction among molecules of substance. WATER STICKS to EACH OTHER. • Examples: • High Specific Heat- • Water resists changes in temperature. Its must absorb MORE energy to increase in temperature than most other compounds. • Examples:

  5. 4. I can explain the role of hydrogen bonding and its relationship with some of the unique characteristics of water. • Liquid at room temperature and body temperature. • Ice Floats- The density of liquid water is greater than solid ice. • Aquatic organisms can survive in cold winters. Snow accumulation on top of floating ice in freshwater lakes acts as an insulator. • High capacity to absorb and release heat. (High specific heat)—Exceptional coolant- when water evaporates it carries away the excess het in car radiator, power plants, human body (sweat).

  6. Climate- Large bodies of wate r influence regional climate. When water evaporates from seas, rivers, and lakes, heat is absorbed. By absorbing vast quantities of heat, the oceans and droplets of water in clouds help moderate global temperatures. • Climate- Water stores heat more that the ground does. When the weather turn cold, the ground cools more quickly. Water retains more heat and is able to provide more warmth for a longer time to the areas bordering it.-- Crash Course Video

  7. EXIT SLIP- On Your own Paper • Draw and label a molecule of water • Explain polar molecule. • List 3 properties of water. Explain one property and describe an example.

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