This is 7th grade science plz explain how scientists use geologic time to determine the age of landforms.

The process by which natural forces move weathered rock and soil brim one place to another is called

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.