What is the best description of weathering? a. breakdown of rocks through mechanical or chemical processes. b. when rocks layers from horizontally. c. building up earth's surface through deposition. d. processes that make it difficult to determine the age of rocks.

Which describes interactions between substances and stomata during photosynthesis? check all that apply. oxygen enters stomata. oxygen is released through stomata. carbon dioxide enters stomata. carbon dioxide is released through stomata. hydrogen enters stomata. hydrogen is released through stomata.

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?