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Inorganic solvents

Author reliablility handout

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Name ____________________________________________ Period ____________ AP Env. Science Date __________________ Title: How does Global Warming Effect Plant Growth? Lab # _________________ Procedures: Each group will design and implement an experiment to test the factors associated with global warming and discover how these factors may affect the plant growth in our future. Brainstorm some factors (environmental changes) associated with global warming: __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ _________________________________________________________

chemistry

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AP Chemistry Final Exam Version P Fall 2005 3 Free Response questions, 45 minutes CALCULATORS MAY BE USED. You will also have a periodic table, equation sheets, and the standard reduction potential table. Clearly show the method used and the steps involved in arriving at your answers. It is to your advantage to do this, since you may obtain partial credit if you do and you will receive little or no credit if you do not. Attention should be paid to significant figures. Note: For all questions, assume that the temperature is 298 K, the pressure is 1.00 atmospheres, and solutions are aqueous unless otherwise specified. Record all your work on this exam; you will only be given credit for answers showing work. NAME: PERIOD: 1 2 3 4 January 10-12, 2006

2009 Scoring Guideline Essay Question 3

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AP? BIOLOGY 2009 SCORING GUIDELINES (Form B) ? 2009 The College Board. All rights reserved. Visit the College Board on the Web: www.collegeboard.com. Question 3 Water is essential to all living things. (a) Discuss THREE properties of water. (b) Explain each of the following in terms of the properties of water. You are not limited to the three properties discussed in part (a): ? the role of water as a medium for the metabolic processes of cells ? the ability of water to moderate temperature within living organisms and in organisms? environments ? the movement of water from the roots to the leaves of plants (a) Discuss THREE properties of water (6 points maximum):

Chapter 3 Outline

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Chapter 3 Biology Outline- ?Water and the Fitness of the Environment? The polarity of water molecules results in hydrogen bonding Water is more extraordinary than people thing because water is everywhere. The unequal ?v? shape of a water molecule makes it a ?polar molecule?. Polar molecules have a positive charge on one side of the molecule and a negative charge on the other side. The polar molecules are attracted to each other (they are like magnets) and that is why water always forms droplets and stays together. Four emergent properties of water contribute to Earth?s fitness for life Cohesion Water molecules stick together due to hydrogen bonding. Cohesion contributes to the transportation of water and dissolved nutrients going against gravity in plants.

AP Bio Chapter 3 notes

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Chapter 3 ? Water & Fitness of the Environment Effect of Water?s Polarity Polarity of water causes hydrogen bonding Water is made up of 2 hydrogen and 1 oxygen; held together by 1 covalent bond Oxygen is slightly negative and hydrogen is slightly positive ?> polarity Polarity causes hydrogen to be attracted to other oxygen molecules, creating hydrogen bonds; each molecule can be connected to 4 other molecules 4 properties of water Water?s cohesion Stabilization of temperature Expansion upon freezing Versatility as a solvent Cohesion of water molecules Hydrogen bonds keep water molecules sticking together - hydrogen bonds are very weak; they form and reform with great frequency Cohesion: the process in which hydrogen bonds hold the substances together

Campbell Biology Chapter 3 outline

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CHAPTER 3 ? WATER AND LIFE THE MOLECUES THAT SUPPORT ALL OF LIFE Water is the only natural substance to exist in all 3 states of matter: Solid Liquid Gas WATER molecule is a polar molecule It has a positive and a negative end It can make up to 4 Hydrogen bonds that break and reform instantaneously. 4 Emergent properties of water COHESION The linking together of like molecules, often by hydrogen bonds. Water sticks to itself Adhesion- water sticks to something else Surface Tension ? A measure of how difficult it is to stretch or break the surface of a liquid. Water has a high surface tension because of the hydrogen bonding of surface molecules MODERATION OF TEMPERATURE BY WATER HEAT AND TEMPERATURE Kinetic Energy ?

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