A) a toxic substance B) an unnatural additive placed in food C) any substance that is not alive D) any substance that has a definite composition
A) mathematical modeling B) the chemistry of living things C) non-carbon related compounds D) the identification of the composition of materials
A) crystals and minerals B) properties, changes, and relationships between energy and matter C) the chemistry of living things D) carbon-containing compounds
A) by accident B) only to make money C) long after the basis research is complete D) in order go learn basic information
A) to develop new products B) to gain knowledge C) to solve a particular problem. D) to understand an environmental problem
A) by accident B) to solve a particular problem C) in order to make money D) to learn basic information
A) mass B) volume C) amount of energy D) density
A) being brittle and hard B) being malleable and ductile C) the ability to carry an electric current well and to hold electric charge D) taking up space and having mass
A) the smallest unit of matter that maintains its chemical identity B) smaller than an electron C) the smallest unit of a compound D) always made of carbon
A) mass B) density C) volume D) weight
A) light B) water vapor C) air D) smoke
A) as the force of Earth's gravity on an object increases, the object's mass increases B) mass is determined by comparing the mass of an object with a set of standard masses that are part of a balance C) mass if often measured with a spring scale D) mass is expressed in pounds
A) boiling B) cutting C) grinding D) burning
A) burning B) igniting C) rusting D) melting
A) equilibria B) products C) synthetics D) reactants |