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) the identification of the composition of materials B) non-carbon related compounds C) the chemistry of living things D) mathematical modeling
A) properties, changes, and relationships between energy and matter B) carbon-containing compounds C) crystals and minerals D) the chemistry of living things
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 gain knowledge C) to solve a particular problem. D) to understand an environmental problem
A) by accident B) in order to make money C) to solve a particular problem D) to learn basic information
A) mass B) density C) volume D) amount of energy
A) being malleable and ductile B) being brittle and hard C) taking up space and having mass D) the ability to carry an electric current well and to hold electric charge
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) volume B) weight C) mass D) density
A) smoke B) air C) water vapor D) light
A) mass if often measured with a spring scale B) as the force of Earth's gravity on an object increases, the object's mass increases C) mass is expressed in pounds D) mass is determined by comparing the mass of an object with a set of standard masses that are part of a balance
A) cutting B) grinding C) boiling D) burning
A) burning B) rusting C) igniting D) melting
A) equilibria B) reactants C) synthetics D) products |