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Water Properties (2.2) Part 1Pre-AP Biology Water Properties (2.2) Part 1
Earth 2/3rds covered by water
Organisms are mostly water
Polar covalent bonding of water molecule See how each end(pole) has an electrical charge?
Hydrogen bonding between water molecules See the central molecule bonding to the 4 outside molecules?
Water needs to get to the leaves for PhotosynthesisWater needs to get to the leaves for Photosynthesis. Cohesion of water helps.
Adhesion See the water molecules binding to the Na+ or Cl-Adhesion See the water molecules binding to the Na+ or Cl-? Which atoms of water are are attracted to the Na+? How about to the Cl-?
Earth and Temperature
States of Water on Earth Solid, Liquid, and Gas
All four Hydrogen bonds have to break at the same time to allow water to evaporate in a gas. That requires a lot of Energy.
Heat Total amount of kinetic energy in a substance There is so much energy moving through the metal, it glows.
Temperature Intensity of all the heat in a substance Which is showing the most intensity? Least?
Ice versus Water It is about molecule movement.
Expansion of water as it freezes Look at the distance between water molecules. Which one looks more dense as a whole?
Life below the water
Water Properties (2.2) Part 2Pre-AP Biology Water Properties (2.2) Part 2
Water dissolving “pulling apart” the salt See the water forming “shells” around the Na+ and Cl-? Which molecule is the solvent? The solute?
Hydrophobic Water “fearing” substances See how they do not interact/mix?
Salt is hydrophilic in water.
Dissociation of Water
pH scale The “H” in pH is for Hydrogen Measuring the concentration of Hydrogen ions (H+) within a substance
Buffering by Bicarbonate in blood Find Bicarbonate in the red blood cells
Acid Rain Source Burning fossil fuels such as oil or gas
The effect of acid rain on plants See the dead trees?
Acid Rain and Concrete
? Water =Life. ? Water =Life Why water is so FREAKIN cool: 1. It’s Polarity gives potential. 2. Cohesion/Adhesion/Surface Tension 3. Amazing solvent.
1 Water. Life on earth evolved in water,and all life still depends on water. At least 80% of the mass of living organisms is water and almost all chemical.
WATER Chapter 3.
CHAPTER 3 Water and the Fitness of the Environment
Biochemistry Chemical reactions in living things..
Water and Its Properties Honors Biology Ms. Kim
Water’s Life support Properties Text pg
Structure of water Oxygen and hydrogen of water is covalently bonded to create a stable molecule. Water is polar because the oxygen region is slightly.
LIFE DEPENDS ON THE UNIQUE PROPERITIES OF WATER.
Biology 107 Water September 2, Water Student Objectives:As a result of this lecture and the assigned reading, you should understand the following:
Chapter 3. The covalent bond of a water molecule Oxygen being more electronegative than hydrogen attracts the electron of Hydrogen close to it. This results.
Biology 107 Water September 1, Water Student Objectives:As a result of this lecture and the assigned reading, you should understand the following:
Water. Water is the biological medium on Earth All living organisms require water more than any other substance Most cells are surrounded by water,
The Single most abundant compound in most living things
MCC BP Chapter 3. Water— The Elixir of Life!. MCC BP Based on work by K. Foglia Why are we studying water? All life occurs in water.
Chapter 2.4 Water—The Elixir of Life! Why are we studying water? All life occurs in water inside & outside the cell.
Water, Acid & Base, and pH Nestor T. Hilvano, M.D., M.P.H. (Images Copyright Discover Biology, 5 th ed., Singh-Cundy and Cain, Textbook, 2012.)
50-95% of any functioning living system. 98% of water on earth is in liquid form.
CHAPTER 2 Water and Life
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