The mass of a block is 2.5 g the volume of the block is 4.1 mL.  what is the density of the block

One or more substances changing into one or more substances is an example of a

The melting point of sulfur is 115 °c and its boiling point is 445 °c. what state would sulfur be in at 200 °c?

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles