Which of the following was used to figure out the age of the Earth a) zircon crystals
b) fossil record of dinosaurs
c)oceanic rocks
d) written observations by humans

will give to the first correct answer! need this asap!​

Which of the activities listed below could limit global warming by slowing the increase in atmospheric carbon dioxide levels? view available hint(s) select all that apply. a. replacing fossil fuels with nuclear energy b. burning vegetation to clear land for agriculture c. limiting soil erosion so organic matter takes longer to decompose d. choosing a fuel-efficient car, or bicycling to school or work e. using more electrical appliances and cars f. cutting down forests to build houses

Physical features of central america look at the map above which of the following is true

In what way does renewable energy differ form nonrenewable energy?