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