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