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