Select all the correct answers a strong magnetic field surrounds earth. how does earth’s magnetic field humans? a. it holds people’s belongings thigh to the earth’s surface. b. it’s responsible for cycling water through earth’s four spheres. c. it keeps the solar wind from reaching earth. d. it people navigate using a compass. e. it cool earths surface.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)