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