What methods do scientists use to determine if a change was physical or chemical?

Entropy is greater at higher trophic levels than at lower levels ... True of False

What does an eco psychologist study

Which of the following apply to coal? Select all that apply. A.) pollution is a problem related to burning soft coal. B.) coal undergoes decomposition when heated to high temperatures in the absence of air. C.) propane is a type of coal. D.

Which of the following is not an SI

Why are scientist surprised to find coal in artic

What is the best name for the molecule below? a compound with 10 total carbons with a double bond and the rest single bonds.

What Word means the gradual change and build up of organisms in an enviroment

If you see the Sun is high in the sky, what can you say about the SUN as viewed from the opposite side of Earth at the same moment?

What element has 8 valence electrons

Which of the following best describes a metal? Brittle, shiny, and solid Brittle, dull, and low density Malleable, shiny, and able to conduct heat or electricity Malleable, dull, and solid, liquid, or gas at room temperature?