Oxygen is perhaps the most important atom on Earth. It is responsible for life as we know it, and it is the most abundant atom in our planet. There are
more oxygen atoms on Earth than all the other elements' atoms combined.
It was discovered as an atom by Antoine Lavoisier in 1777.The image shows
the Bohr atom model for Oxygen. Which of the following electronic
transitions in the oxygen atom will result in light emission?

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.