The hypothesis is that batteries will supply power for a shorter length of time when temperatures fall.

You will test the performance of batteries at different temperatures, -78°C, 0°C, and 24°C. You will place the battery in a plastic bag with jumper wires, and place it in a beaker with either dry ice or ice cubes. Then, you will connect the fan to the wires and time how long it takes for the battery to run out of power.

You will need 3 Energizer, 3 Duracell, and 3 Eveready AA size batteries, 6 plastic bags, 6 rubber bands, a battery holder, 2 jumper wires with crocodile clips, a AA battery-operated table fan, 2 beakers, 1 kg of dry ice, 1 kg of ice cubes, safety goggles, and a clock.

The results showed that the maximum operation time of the batteries became shorter as the temperature fell. At a temperature of -78°C, the batteries only lasted a few minutes.

This science project is interesting because it explores how temperature affects the life of a battery, which is an important factor to consider when using batteries in different environments.

Consider repeating the experiment at higher temperatures of 40°C, 50°C, and 60°C. Also, try using rechargeable batteries, such as Nickel Metal Hydride batteries.