Scientists made the following two observations about emission spectra Each Element has a unique emission spectrum
Atoms emit energy only at specific wavelengths
Describe how the Bohr model explains both of these obersavations

Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians?

What is the best describtion of the side of the moon that faces earth?