Scientists suspect that modern horses have different dietary habits than horses that lived long ago. what is the most reliable source that scientists can use to prove that horses have changed over time? a. interviews with veterinarians b. fossil evidence c. cave drawings d. fables

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1