What is the name for the rocky upper layer of the solid earth?
a. biosphere
b. lithosphere
c. atmosphere
d. magnetosphere

It is A

Explanation:

It is A because I took the test and it was correct

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.