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Study Guide for 8th Grade Chemistry Final Exam Unit 1: Scientific Method and Measurement Be able to: - Tell if a statement is a hypothesis or a prediction - Identify the independent variable, dependent variable, and controlled variables in an experiment - Convert between units in the metric system - Convert between SI(metric) and English units Unit 2: States of Matter/Density Be able to: - Define matter - Define and differentiate solids, liquids, and gases in terms of shape and volume - Compare the particle motion in solids, liquids, and gases - Explain what plasma is and where it is found on Earth and in the universe - State and apply Boyle’s Law - Describe the changes between states of matter - Calculate the density of a substance - Compare substances based on their densities Unit 3: Atoms & Periodic Table Be able to: - Identify and describe the 3 particles that make up an atom (charge, size, etc) - Explain why atoms are neutral - Determine how many protons, neutron, and electrons are in an atom when given the atomic mass and atomic number - Define valence electrons and determine an atom’s valence electrons by looking at a periodic table - Locate metals, non-metals and metalloids in the periodic table - Draw dot diagrams for a given element Unit 4: Classifying Matter Be able to: - Identify real life examples as elements, mixtures, and compounds - Give the three types of mixtures Unit 5: Chemical Bonding Be able to: - Identify the groups within the periodic table and common characteristics of each - Define covalent bond, double bond Explain the difference between a polar and a nonpolar bond Determine the number of atoms in a molecule if given a chemical formula Define ionic bonding, cation, anion, polyatomic ion Name and write formulas for ionic and covalent (molecular) compounds Unit 6: Chemical Reactions Be able to: - Define: chemical reaction, chemical equation, reactant, product, activation energy - Identify and describe the four types of chemical reactions - Balance chemical reactions - Explain the difference between an exothermic and an endothermic reaction Unit 7: Acids/Bases/Solutions Be able to: - Define: unsaturated, solute, saturated, solvent, solubility, indicator - Interpret the information on a solubility graph - Describe how solutes effect the freezing and boiling points of solvents - Describe the ions formed when acids and bases are dissolved in water - Explain the difference between strong/weak acids and strong/weak bases - Describe the pH sale and tell how it is used - Explain what happens in a neutralization reaction Unit 8: Organic Compounds Be able to: - Define: organic compound, hydrocarbon, isomer, saturated hydrocarbon, unsaturated hydrocarbon - List and compare the different forms of pure carbon - Name hydrocarbons based on a description - Identify the 4 kinds of biochemicals - Give the building block molecule for each of the 4 kinds of biochemicals - Describe the use/function of each kind of biochemical Unit 9: Atomic Energy Be able to: - Define: half-life, radioactivity, nuclear radiation, nuclear fission, nuclear fusion - Solve half-life problems - Describe the difference between nuclear fission and nuclear fusion