Water is unusual because it expands as it freezes. very few substances have this property. the reason liquid water is more dense then ice can be best explained by? a) water is the universal solvent. b) water has an unusually high boiling point. c) water contains elements that are not common in other substances. d) water is polar and the positive and negative ends of the molecule attract each other.

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.

Analyze how the water cycle affects a food web. now list 3 examples for each below using complete sentences, on how too much water would affect the same web? how about to little water?

Which to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast