biome hw 1

fresh water
What causes the freshwater to have low salt concentration?
I think the reason for the low salt concentration is because natural reasons.

Marine
Originally was the world all a ocean?
I remember hearing the world was originally all a ocean.

Desert
what is the coldest it gets in the desert?
"Many mean annual temperatures range from 20-25° C. The extreme maximum ranges from 43.5-49° C. Minimum temperatures sometimes drop to -18° C".

forest
How much of the earth does the forests take up?
"forests occupy approximately one-third of Earth's land area, account for over two-thirds of the leaf area of land plants, and contain about 70% of carbon present in living things".

grassland
What are the mosts places with grasslands?
"Savannas of one sort or another cover almost half the surface of Africa (about five million square miles, generally central Africa) and large areas of Australia, South America, and India".

tundra
What is a tundra?
"Tundra is the coldest of all the biomes. Tundra comes from the Finnish word tunturi, meaning treeless plain. It is noted for its frost-molded landscapes, extremely low temperatures, little precipitation, poor nutrients, and short growing seasons".