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