Read these two excerpts. Which two factors helped scientists determine that the Deccan volcanoes were harmful to species living during that time? A) the carbon dioxide found in plankton shells B) the water found in plankton shells C) the presence of mercury in the Earth's soil D) the presence of iridium in the Earth's soil E)the presence of acid in the Earth's soil

Each main point should be noted in an outline as a roman numeral o a capital letter a number 1 any of the above none of the above

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)

Speaking rapidly in a large gymnasium causes your words to run together; making them hard to distinguish. true false