If you wanted to brighten a room, which of the following actions would you most likely take? increase the medium density in the room decrease the medium density in the room increase the photons in the room decrease the photons in the room

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.