B because inner core has metal and it’s solid
Answer: when its in the air
Explanation:
please brainliest me
Because all atoms are made from the same particles which are protons, neutrons, and electrons.
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sound wave cannot travel without a medium.
Answer is: <span>the pH value(level) is the independent variable.</span><span>
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Missing question: <span>We conducted an experiment where we added 0.5 g of lactose to 5 different test tubes all containing 5 different pH levels. What is the independent variable?
In this experiment pH level changes, so results depend on different pH values.
Mass of lactose is same during experiment,so t</span>he number of molecules of product formed per minute is the <span>dependent variable.</span>
