A group of students from another class wanted to improve their electromagnet design. Starting with the standard design that everyone used in class, they decreased the number of winds on the core and added three more batteries. Then they tested their new design. Their electromagnet could pick up more paper clips than the original design. They recorded the following conclusion: The fact that our modified electromagnet picked up more paper clips tells us that less winds and more batteries are both ways to make an electromagnet stronger. Evaluate this group's investigation and explain to them why you agree or why you disagree with their conclusion. Evaluate this group’s investigation and explain to them why you agree or why you disagree with their conclusion.

it's filtration, but this is an assumption so my apologies if i got this

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.

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but