The water cycle would not be possible without and . Options
1. evaporation; condensation
2.gravity; sun
3.precipitation; rain
4.gravity; precipitation

The density of glycerin is 1.26grams/centimeter cubed . how many is this? use the conversion rates of and . express your answer to the correct number of significant figures.

How will the emission of an alpha particle affect the atomic number of an atom

What are transitions between a liquid and a solid called? identify which way they are transitioning