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