Check all statements below that ar true. heating air under the balloon will cause the air inside to expand. the air inside will have the same mass but more volume. heating the air under the balloon will cause the entire balloon to rise. the outside temperature will have no affect on the height of the balloon. the only way to make the balloon sink is to let out the air.

Autotrophs a.consume their food to get energy b.may use photosynthesis to gain energy c.are also called consumers d.cannot use solar energy

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

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.