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