Scientists will study how earths magnetic field changes as distance from earth changes. satellites will be placed at different distances from earth and will be used to measure the strength of earths magnetic field. Q: which of the following is the independent variable in this experiment? A: magnetic field strength
B: distance from earth
C: size of satellite
D: mass of satellite
E: gravitational force of earth

Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation