T or F a heat engine is a device that converts the heat that flows from a warmer object to a cooler object into work

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

How do living things obtain phosphorus

There are only about 250,000 known fossil species. true or false