Based on their state of matter alone, is it easier to speak of the shape of the sun or the moon?

What must be in balance for temperatures to remain constant?

Which radioisotope is used to date fossils? a. oxygen-16 b. carbon-14 c. uranium-238 d. carbon-12

Na chemical reaction, activation energy increases the of the reactants. this outcome causes the particles to collide, which results in the of new products.