Mark first arrivals in the following seismograph record. there is a clear break in slope, so it means you are dealing with a 2-layer case. use a metric ruler to measure times, because precision is going to make a big difference. the first arrival for the 800 m geophone happens to be at 800 ms. once you have measured your times use excel to plot your data, like you did in question 3, to calculate seismic velocities and depth to the interface. (l6pts) 800 ms geophone distance (m)

the answer is crop rotation

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.