Circle the letter of the sentence that is true about the law of superposition.
a. younger rocks lie above older rocks if the layers are undisturbed.
b. older rocks lie above younger rocks if the layers are undisturbed.
c. rock layers are never disturbed.
d. the youngest rock layers are typically at the bottom.

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

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

How might this scientific phenomena be explained? a paper clip floats on water.