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Science

Chapter 3

TermDefinition
Protons positive charge
Neutrons no charge
Electrons negative charge
Atoms basic unit of measure (protons, electrons and neutrons)
Molecules two or more atoms joined by covalent bonds
Compounds substances made up of two or more elements (H2O)
Organic Compounds Carbon to carbon bonds living organisms need them to live
Inorganic Compounds lacks carbon to carbon bond, makes up non living things (salt)
Hydrocarbons hydrogen bonded to carbon, heating
Proteins supports chemical production
Carbohydrates Energy is not available without them
Lipids Stores energy
Nucleic Acids (sugars) Makes protein, cells communicate so your body can react
POW:Polarity Unequal charges
POW: Hydrogen bonds opposites attract
Adhesion water is attracted to other substances
Cohesion Water is attracted to water
States of Matter Solid: Ice Liquid: Water Gas: steam or fog
POW: Water is less dense as a solid Ice floats because it is less dense than liquid water
POW: High Specific Heat It releases heat energy slowly and help living organisms regulate their body temperatures
POW: Universal Solvent Water dissolves almost any substance (except lipids)
Capillary action Water can travel upward because it is Adhesive
Are ice molecule tightly packed together or spread apart spread apart
pH Scale tells whether substance is acidic, basic or neutral
Acid 0-6.9
Base 7.1-14
Neutral 7 (ONLY WATER)
Popular Earth Science sets

 

 



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