6) Which of the following is a TRUE statement? A: Solids, liquids, and gases cannot be changed. B: When an ice cube melts and changes to water it is a chemical change. C: Changing a liquid to a solid, or a solid to a gas may be a physical change. D: The change in temperature of a liquid is not a physical change. 1) Chemists categorize chemical changes into three main classes. Which of the following is NOT one of those changes? A: Inorganic B: Organic C: Biochemical D: Geothermal
2) Which chemical change describes the reactions of elements and compounds that, in general, do not involve carbon and typically take place in laboratories or industries? A: Geothermal B: Inorganic C: Organic D: Biochemical
3) Which chemical change is concerned with the chemistry of carbon and the elements and compound with which it reacts? A: Geothermal B: Organic C: Inorganic D: Biochemical