Which of the following items are biodegradable?
dirt
twigs and branches
grass clippings or leaves
food garbage (such as banana peels and apple cores)
plastic cup
newspaper
aluminum foil
tissues
paper towels
tin can

i do not know and i have a 100 in this class

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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.