Does the water pass easily through the gravel? yes
Repeat the same procedure with the sand and silt. What do you notice?

Explain how the density of ocean water is affected by temperature and how this results in major ocean currents distributing heat away from the equator toward the poles?

The chemical or mechanical process by which rock is gradually broken down eventually becoming soil

Compared with the land in the highlands, the lowlands region of england a) rockier and more difficult for farmingb) the center of business and industryc)richer in coal reservesd)covered by more fertile farmland d) covered by more fertile farmland