Not really.
They can be 'designed' to elicit a certain reaction in an audience, but, if the audience is aware of how film-makers manipulate them, then they can avoid reacting predictably.
Indicators are compounds that react with acids and bases to make certain colors. (:
Yes
They study chemicals and see how they react to certain situations.=
Certain gases that react with oxygen, for example hydrogen.
Nitrogen is relatively inert and does not usually react with other substances at room temperature. However, under certain conditions such as high temperatures or with certain catalysts, nitrogen can react with other elements to form compounds like ammonia or nitrogen oxides.
no
Cat videos can help people understand their behavior by scientifically recording how cats react to certain impulses and situations. Most cat videos, however, or recorded of cat behavior at its furthest extremes. Therefore, most cats will not behave the same way as most cat videos.
They watch them in certain studies. They might also provide surveys to see how people would react to certain things.
Blood types do not determine your personality. Your upbringing and other genes in you body determine how you react to certain situations and how your personality is.
Yes, most notably acids will react with bases and some metals.
Silicon primarily reacts with nonmetals such as oxygen, sulfur, and halogens. It can also react with certain metals to form silicides.
Most elements will react with at least one other substance. Certain groups of elements have certain substances that they react or don't react with. For Example, Group 1 - Alkali Metals all react vigourously with water. The Inert Gases (exc. Radon) are all highly unreactive and react with a very small amount of substances, if any.