Can someone pls help me with this 2 questions!!

water contracts and ice sinks

For #2, water expands when it freezes, therefore it floats!

Explanation:

Water first condenses when it freezes until it reaches about 4 degrees Celsius, where it then slowly expands by about 9%. It also floats! You can observe this yourself by placing ice into a glass full of water.

Ice floats because it is less dense than the water below.

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.