If carbon 14 dating is one of the best known methods to determine the age of fossils, then the age of a fossil can sometimes be determined by what method? Answer choices: - microscope - an electron microscope - fossilized electrons - fossilized gamma rays - Carbon fibers - carbon 14 dating - chemical equations - Physical weathering
carbon 14 dating

If animals require a type of fluid to survive, then what requires a type of fluid to survive? Answer choices: - snail - wind - tapeworms - mussels - stones - animals - sand - Nematoda
animals

If plants are sensitive to darkness, then what are plants sensitive to? Answer choices: - Pollution - sun's heat - gravity - moon - competition - darkness - temperature - tides
darkness

If cottonwoods go dormant when the days are shorter, then what happens to cottonwoods when the days get shorter? Answer choices: - They bloom - They go dormant - Dehydration - It helps them survive - Exfoliation - They die - They reproduce - They may not survive.
They go dormant