the nature of science. science, technology, and society. motion, acceleration, and forces. the laws of motion. energy. work and machines. the earth-moon-sun systems. the solar system. heat and states of matter. waves. sound and light. earth"s internal processes. electricity. magnetism. electromagnetic radiation. energy sources. weather and climate. classification of matter. properties of atoms and the periodic table. earth materials. earth"s changing surface. chemical bonds. chemical Reactions. solutions, acids, and bases. nuclear changes. stars and galaxies.