The materials required for this science fair project are as follows:
- a packet of peanuts
- a packet of cashew nuts
- 2 paper clips
- a lighter
- a pin
- a measuring cylinder
- 2 test tubes
- 200g of water
- a digital weighing machine
- a stopwatch
- a thermometer
1. For this science fair project, the independent variable is the type of nuts used. In this science project experiment, the nuts are heated. The first dependent variableis the temperature of the water. The temperature is measured using a thermometer. Weigh the nuts, using a weighing machine, after they are heated. This weight is the second dependent variable. The constants (control variables) are the amount of water used, and the length of time for which the nuts were allowed to burn.
2. A peanut and a cashew nut are selected. A small hole is made on each nut using a pin. In procedure 3, mount the nuts on paper clips through the hole. The nuts are weighed and this measurement is recorded.
3. 2 paper clips are bent, as shown in figure 1 below, and the nuts are mounted on them.
4. A test tube is filled with 100g of water and mounted on a stand, as shown in figure 1. The base of the test tube should be 5mm above the peanut. The temperature of the water is measured using the thermometer.
5. The peanut is set on fire using a lighter. Once it starts burning, it is placed below the test tube and allowed to burn for 1 minute. After 1 minute, the fire is extinguished and the temperature of the water is measured.
6. If there has been an increase in the temperature of the water, calculate this and record it in the table below.
7. The peanut's weight is recorded in the table below.
8. Procedures number 4, 5, 6 and 7 are repeated with the cashew nut.
Ensure that you handle the lighter with care. Adult assistance is required. Conduct the experiment in a safe, properly equipped laboratory.