A) an unnatural additive placed in food B) any substance that is not alive C) any substance that has a definite composition 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) the chemistry of living things B) carbon-containing compounds C) properties, changes, and relationships between energy and matter D) crystals and minerals
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 develop new products C) to gain knowledge D) to understand an environmental problem
A) to learn basic information B) by accident C) to solve a particular problem D) in order to make money
A) volume B) amount of energy C) density D) mass
A) the ability to carry an electric current well and to hold electric charge B) being brittle and hard C) taking up space and having mass D) being malleable and ductile
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) density B) volume C) mass D) weight
A) smoke B) water vapor C) air D) light
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) 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) burning B) cutting C) grinding D) boiling
A) rusting B) igniting C) burning D) melting
A) reactants B) equilibria C) products D) synthetics |