The correct sequence of engine operation is given by option C. intake, power, compression and exhaust. The first step is the intake of air, in the case of petrol engines, fuel is taken in as well. The second step is compression. The third step is combustion or power, in this part, the fuel is injected. The last step is exhaustion which refers to the blowing out of the waste gases from combustion.
The sand is just small rocks and pebbles broken down, we know that on a hot day rocks can heat up if left alone for long enough especially if they are dry.
both aerobic respiration and fermentation produces carbon dioxide as a product but however fermentation occurs without oxygen and this was seen in the experiment.
