+ Ch 2 Science, Matter, Energy, and Systems

+ 1 A _______ feedback loop causes a system to change further in the same direction Negative Corrective Nominal Positive polarized

+ 2 Which of the following is an example of a chemical reaction? Combustion of gasoline Sugar dissolving in water Toasting a piece of bread Melting butter None of the above

+ 3 Which of the following is an example of the second law of thermodynamics? I 90% of the high quality chemical energy in gasoline burned in automobiles is degraded to low-quality heat II most of the chemical energy in the food an organism eats is given off as waste heat, making less available for the next trophic level III Much of the electrical energy flowing through an incandescent light bulb is given off as heat I onlyII onlyIII only I and III, II, and III

+ 4 Isotopes which spontaneously emit high-energy radiation Nuclear fission Potential energy Radioactive decay Nuclear fusion Electromagnetic radiation

+ 5 A nuclear change in which 2 isotopes form a heavier nucleus and energy Nuclear fission Potential energy Radioactive decay Nuclear fusion Electromagnetic radiation

+ 6 Occurs when 2 isotopes of large mass are split to form lighter nuclei and free neutrons Nuclear fission Potential energy Radioactive decay Nuclear fusion Electromagnetic radiation

+ 7 A form of kinetic energy which travels in waves Nuclear fission Potential energy Radioactive decay Nuclear fusion Electromagnetic radiation

+ 8 Which term describes the ability to do work and transfer heat? Work Energy Electromagnetic radiation Nuclear fusion Chemical reaction

+ 9 The law of conservation of matter says: Matter quality increases when energy changes from one form to another Energy is neither created nor destroyed in a physical or chemical reaction Matter quality decreases when energy changes from one form to another Material efficiency increases with energy utilization Atoms can neither be created nor destroyed in a physical or chemical reaction