C. a helium atom has a diameter of approximately 9.8 • 10-11 meters. what is the diameter of a helium atom in nanometers? given unit: answer unit: solution:

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.