Antonio observes the weather one afternoon. He claims that thunderstorms are likely. Which observation provides evidence that supports this claim? There is a light wind. The temperature is 23 °C (75 °F). The winds are blowing from the east. The clouds are mainly cumulonimbus.

The clouds are mainly cumulonimbus.

Explanation:

A Thunderstorms is a relatively small storm but usually quite intense. As little as 10 percent of thunderstorms may be considered severe globally. These severe thunderstorms may lead to high winds, hail, flash floods, and tornadoes. Severe thunderstorms may be injurious to health and even lead to fatalities.

Thunderstorms are produced by cumulonimbus clouds, hence Antonio's observation of a cumulonimbus correlates well with the prediction of a thunderstorm.

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.