Although most people can speak at a rate of 125-150 words a minute, the brain can process words at a rate of

The energy required to vaporize a certain amount of a substance is greater than the amount of energy necessary to raise the temperature of the same amout of that substance by 1 degreee celcius

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.