Four friends were talking about how matter and energy move through an ecosystem. this is what they said: will - "i think only energy cycles through an ecosystem." mike - "i think only matter cycles through an ecosystem." dustin - "i think both matter and energy cycle through an ecosystem." lucas - "i think neither matter nor energy cycles through an ecosystem." which friend do you most agree with? explain your thinking.

Fugu, also known as puffer fish, is a sushi delicacy that can also be lethal. puffer fish contain a powerful toxin that can kill an adult a few hours after ingestion. sushi chefs who prepare fugu must be specially trained because any contamination of the toxin-free areas of the fish can be deadly. recently this toxin has been put to good use, as scientists have discovered that a purified form of it can treat severe pain in cancer patients. this recent scientific discovery would fall under which area of chemistry? applied biochemistry pure organic chemistry pure physical chemistry applied inorganic chemistry

Which of the following methods uses the decay of atomic particles in an object to find its exact age? a. fossil dating b. geologic dating c. radioactive dating d. relative dating

If a gas has an initial pressure of 101kpa and a volume of 10l, then it expands to a volume of 20l, what is the new pressure?