Why does ice float after it crystallizes?
its specific gravity is greater than water.
its density is greater than water.
its density is less than water.
air trapped in ice causes it to float.

This graph gives information on changes in sea ice extent in the arctic ocean over a 30-year span. the overall trend shows in the ice extent. to address the trend, scientists need to ask themselves, one direct consequence of the trend is that

Matches the chemical name of each oxide of phosphorus to its chemical formula

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.