You’ll mix food coloring with water at two different temperatures. Measure and pour ½ cup of hot water from the faucet into a glass. Then measure and pour ½ cup of cold water from the faucet into the other glass. Hold the dropper of food coloring just above the surface of the water, and carefully add one drop in the center of each glass. Wait a few minutes and then look at the glasses from the side. Place the white piece of paper behind the glasses to make it easier to see. What do you observe? Is there a difference in how it mixes?

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet