Can some one explain what an orbital is in their own words, don't understand googles

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

What is i fracture in the crust called when land move up, down or sideways

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?