Conduct an experiment into how heat affects the dissolving of salt, sugar or other solubles in water. Half-fill a measuring cup with tap water at 40 degrees Ft. Add a tablespoon of your soluble to the mix and start a timer before stirring the contents of the cup with a spoon in a uniform, even fashion; you must be able to repeat this stirring action at the same speed and profile later. Observe the contents of the cup until the material has dissolved completely. Write down the time. Repeat this test for different temperatures of water, again half-filling the cup, using 1 tbsp. of your soluble and stirring using the same spoon, speed and profile. Compare your results for different temperatures.
Carry out an investigation into how different temperatures affect th power of a magnet. Expose four identical magnets to different temperatures, such as in a freezer, refrigerator, room temperature and oven heated to 200 degrees F. Handle your magnets with rubber gloves on, as the extremes of temperature make them uncomfortable on your skin. Fill a large, plastic container with 100 ball bearings and place a second, empty container next to it. To test a magnet, lay it in the middle of the container on top of the ball bearings and wait for 20 seconds before removing the magnet and placing it in the second, empty container. Here, shake loose and count all of the ball bearings the magnet collected. Repeat the test for a specific temperature at least three times and take an average. See how many ball bearings were collected by magnets at different temperatures.
Conduct an experiment into Alka-Seltzer reaction rates when dissolved in different temperatures of water. Connect a small, plastic bottle to the narrow end of a 60ml syringe using a small tube. Drill a small hole in the lid of the bottle cap, slightly narrower than your tube, before securing the tube in the hole to form an airtight seal. Test each different temperature by half-filling the bottle with water --- mark this with a pen --- before dropping in an Alka-Seltzer tablet and quickly replacing the cap as a volunteer starts a timer. Make sure the plunger in the syringe is fully depressed, as this will move back up the syringe tube due to the carbon dioxide released, allowing you to measure gas levels. Swirl the water in a gentle circular motion with one hand while, when your volunteer calls out "time" every 10 seconds, noting down the carbon dioxide level in the syringe. Compare the reaction rate and carbon dioxide produced by each different temperature of water.
Investigate the effect of air temperature on the rate of crickets chirping. Conduct your experiment over a number of days or even weeks by finding a local area with plenty of crickets. Measure the air temperature using a thermometer before noting a tally of every instance of a cricket chirping that you hear for a set time period, such as two minutes. Repeat this testing procedure at the same time of day for at least five days, looking for the widest range of air temperatures possible. Once you have a comprehensive set of results, consider how air temperature affects the rate of crickets chirping.