biology campbell reece exam
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Oxides
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Chemical Symbols to Know
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Chemical Symbols to Know
SO2- Sulfur Dioxide (burning coal)
NO- Nitric Oxide
NH3- Ammonia
H2O2- Hydrogen Peroxide
H2SO4- Sulfuric Acid
NO2- Nitrogen Dioxide
CO2- Carbon Dioxide (#1 greenhouse gas)
CO- Carbon Monoxide
HNO3- Nitric Acid
N2O- Nitrous Oxide
O3- Ozone
(NH4)SO4- Ammonium Sulfate
SO3- Sulfur Trioxide
CFCs- Chloroflorocarbons
CH4- Methane (greenhouse gas)
biology
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Water is the most unique molecule in our lives. Water is a substance that gives the possibility of life on this Earth as we know it. All organisms that we are accustomed to are made up of mostly water and are habitually accustomed and dominated to water environments. Earth started out in water before land was even present. Our lives remain tied to water and all living creatures need water more any natural habitat that can be found as a solid, liquid or gas. The large quantity of water is the main reason we are able to reside on this beautiful home we call Earth.
AP Biology Campbell/Reece 8e Chapter 3 Notes
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Chapter 3 – Water and the Fitness of the Environment
3.1 – The polarity of water molecules results in hydrogen bonding
• Polar molecule – two ends of the molecule have opposite charges
• Oxygen: δ-
• Hydrogen: δ+
• Positive hydrogen of one molecule is attracted to negative oxygen of another in a hydrogen bond
3.2 – Four emergent properties of water contribute to Earth’s fitness for life
• Four properties: cohesive behavior, ability to moderate temperature, expansion upon freezing, versatility as a solvent
• Cohesion – the bonding of similar molecules through hydrogen bonds
• Adhesion – the clinging of one substance to another
• Surface tension – a measure of how difficult it is to stretch or break the surface of a liquid
• Kinetic energy – energy of motion
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