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.

The correct answer is option D) Water is polar and the positive and negative ends of the molecule attract each other.

The water is a polar molecule, and forms a hydrogen bonding with the other water molecule. In the liquid state, the molecules of the water is in random motion, and the bond between the water molecules are continuously formed and deformed.

In the ice, the hydrogen bond between the water molecules become more stable, due to this, the molecules arrange themselves in a hexagonal pattern. Due to this arrangement, the allover space occupied is expanded. Hence, the ice is expanded than liquid water.

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.