Carbon dioxide is added to the atmosphere: a: as a by-product of solar energy b: from the burning of fossil fuels c: from hydroelectric power plants and dams d: as a waste product from nuclear power plants taking an online quiz so answer correctly

People who exercise for an hour may have lower cholesterol levels. is that a statement? a law? or a hypothesis?

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural. question 2 reflects a moral or social value. question 3 refers to something that can be measured. question 4 reflects a question that can’t be observed.