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