A group of students are wandering around a room. When their teacher claps, the students sit down wherever they are. This situation best models the formation of which type of solid? an amorphous solid because the particles do not have a regular structure an amorphous solid because the motion of the particles stopped a crystalline solid because the moving particles lock into fixed positions a crystalline solid because the particles have a long-range order

A. an amorphous solid because the particles do not have a regular structure

Explanation:

Edge2020 :)

- decrease the number of plants and animals living in the water.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.