What determines how much light will be reflected off of a surface? The speed of light.

The density of the object.

How reflective the surface is.

The mass of the object.

Iron reacts with sulfur to form iron sulfide. if 60 grams of iron reacts with sulfur to produce 90 grams of iron sulfide, how much sulfur has been used in the chemical reaction?

Which changes of state do the labels represent? a: b: 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.