A hypothesis is based on the analysis of data collected in a controlled experiment.
True
False

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.