CAMPBELL BIOLOGY CHAPTERS 1 – 5 EXAM 1 Q’S AND A’S

CAMPBELL BIOLOGY CHAPTERS 1 – 5 EXAM 1 Q’S AND A’S Scientific method: - ANSWER-1) Observation 2) Question 3) Hypothesis 4) Design an experiment 5) Prediction 6) Do experiment/collect data 7) Analyze data What 4 elements make up 96% of living matter? - ANSWER-Carbon, hydrogen, oxygen, nitrogen Atomic Number - ANSWER-Number of protons in the nucleus Mass Number - ANSWER-Sum of protons and neutrons Isotopes - ANSWER-Different number of neutrons Radioactive isotope - ANSWER-decay spontaneously, giving off energy Valence Electrons - ANSWER-found in outermost shell (valence shell) Covalent Bond - ANSWER-shared electrons Ionic bond - ANSWER-strip electrons from their bonding partners Hydrogen bond - ANSWER-Bond two hydrogen Solution - ANSWER-liquid that is completely homogenous mixture of substances Solvent - ANSWER-Dissolving agent in a solution Solute - ANSWER-Substance that is being dissolved Hydrophilic (polar) - ANSWER-affinity for water Hydrophobic (nonpolar) - ANSWER-doesn't have affinity for water Acid - ANSWER-Any substance that increases the H+ concentration of a solution Base - ANSWER-Any substance that reduces the H+ concentration of a solution Acid pH: - ANSWER-pH<7 Base pH: - ANSWER-pH>7