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