element, a substance that cannot be broken down into smaller substances., nucleus*, the center of the atom; positively charged, electron, negative charge, no mass, proton, positive charge, mass = 1, neutron, NO charge, mass = 1, electron cloud, the area of an atom where electrons are found; surrounds the nucleus, condensation, water is formed, polar, when a molecule has a positively-charged end and a negatively-charged end, water molecules, stick together, cellular respiration, when cells get ATP, covalent, atoms share electrons so that their outer shells are filled, ionic, atoms give away electrons or take electrons, lipids, energy storage, insulation and protect membranes, carbohydrates, saccarides (sugars), proteins, amino acids, nucleic acids, nucleotides, lipids*, fatty acids, aerobic reactions, take place in the presence of oxygen, essential elements in the human body, oxygen, hydrogen, nitrogen and carbon, amino acids are the building blocks of ______, proteins, substrate protein, enzyme, nucleus, protons + neutrons, H2O, water, pH scale, used to measure how acidic a substance is from 1-14, valence electrons, how an atom of one element will interact with atoms in another element., cohesion, water molecules stick to each other, adhesion, water molecules stick to other substances, mitochondria, glucose is broken down into water, ATP and carbon dioxide, Photosynthesis, plants need carbon dioxide, water and sunlight to produce (make) glucose and oxygen

Unit 2 test.a

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