Jenny predicts that when water in a cup evaporates, the mass of the water and cup together will get smaller.

how can jenny test her prediction?
a.
use a scale to measure the mass of a cup of water. leave the cup out for one day and measure the mass again.

b.
let a cup of water evaporate for a few days and then measure the mass of the cup.

c.
mix water and sugar in a cup and measure how long it takes to evaporate.

d.
measure the volume of water in a cup. leave the cup out for one day and measure the volume again.

i think the answer is

mass

materials water oxygen those are the things i can think of in this moment.

golgi body just took the test on edge

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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.