A student wanted to determine the evaporation rates of liquids. She placed 50 mL of each liquid outside for an hour on the same day and then measure how much liquid evaporates. Whichwood improve the validity of this investigation

without answers to choose from, I'd say make sure you're using the same shape and sized containers, and they're placed in the same locations at the same time. also you'd probably get a more accurate result by leaving them longer than an hour, more like a day or 2, and do it on multiple different days, when the temperature is different each day and then take an average of those days...

there was no answer choices but i think its representative

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

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