Malika is writing an essay about the Sun. Below is the first paragraph in the essay.
The Sun is an average-size star that is located at the center of the solar system. This hot, glowing ball of gas has a diameter of 1,393,000 km. This means 109 Earths would fit side by side across the diameter of the Sun. At the surface, the Sun’s temperature is about 550 degrees Celsius. Earth is located just under 150 million kilometers from the Sun.
Malika quickly realizes this paragraph contains an error. Which statement identifies the error?
The Sun is a large star, not an average-size star.
The Sun is not a glowing ball of gas—it is solid.
The Sun’s surface temperature is about 5500 degrees Celsius.
Earth is located over 300 million kilometers from the Sun.

answer; protein;

gold is my favorite solid.

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.