4. Since record keeping began, what does the temperature record show for California and how does it affect the snow pack in the Sierras

The answer is below

Explanation:

The record temperature showed that California has undergone an average level of one-degree Celsius increase in temperatures degree in the course of over one hundred years ago.

In turn, the snowpack in the Sierras is affected by being uncovered to sunlight and increased in heat level as a result of snow cover reduction level.

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.