What method do scientists most often use in determining the age of the Earth? *
comparing the amount of uranium remaining and the amount of lead formed in
radioactive dating of rock layers
о
counting the number of sedimentary rock layers in the Earth's crust
о O
observing folds, plate shifting, and unconformities in rock layers
using index fossils to determine the age of rock layers

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water

According to your text, should be in the native language of the parents or guardians whenever possible. a. an email b. consent forms c. oral approval d. storybooks loaned out

Where can a dna be found in a prokaryotic cell