Answer:
Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
Explanation:
They come together to form water. I hope this helps. Let me know if anything is unclear. That is the bases of a neutralization reaction.
Answer:Surface currents are caused by differences in water density; deepwater currents are caused by wind.
Explanation:
The correct answer is D. Digestive
