Question

1. Deep ocean currents are driven by differences in _____.

Answer 1

1. Density, salinity and temperature 2.Gravitational contraction of the earth's interior 3.Wilson's farm is more likely to have coarse soil than Byron's 4.Conduction, convection and radiation 5.Phosphorus cycle.

Reasons: 1) deep within the oceans the water would be more dense due to higher pressure and the water would be cooler than near the surface 2. Gravitational contraction of the earth's interior would probably take much longer than the first few 100  1000's of years as this is but a short time in geological  history 3. Mountains would be expected to have coarser soil than plains because the soil would often be in place whereas on the plains it most likely has been transported say by rivers and therefore it would be more broken down by transport 4.conduction would be heat transfer within a commonly solid body without movement of the material and convection is heat transfer within a fluid due to hot less dense material rising and cooler more dense sinking by gravity and radiation is like the sun's rays type heating 5. Phosphorus is usually solid at the earth's surface so doesn't affect the atmosphere.