Oil
- When oil is coated on the leaves, this will block the stomata and stop it from taking in air. It blocks gaseous exchange between the leaves and the surroundings, so no photosynthesis can take place. So, the plant will wilt.
- When the larva of a mosquito is in the water. a layer of oil poured onto the surface can effectively block the breathing tube and suffocate it.
- Oil spill. The oil floats on the surface of the sea and prevents oxygen from dissolving into the water. Animals living in the water will not get enough oxygen for respiration. Plants will not be able to take in carbon dioxide for respiration.
- Our body is covered in tiny oil wells. There are even oil glands along our eyelids. These tiny oil glands help to keep the eye moist. They are on the upper and lower eyelids and there can be between 50 and 70 in each eye.
- Oil makes the surface smoother, so it reduces friction between the table surface and the block.
- Hair is a natural biological adsorbent. Studies have shown that human hair is able to adsorb three to nine times its weight in oil.
- When too much oil is added into a pan to fry food, an overflow of cooking oil can easily catch fire if the heat is too extreme. Prolonged frying increases the temperature of the oil in the pan. When the temperature of the heated oil reaches 350 degree Celsius, the oil in the pan will catch fire.
- Since oil is lighter than water, the water poured into a grease fire will sink to the bottom of the pan. Hence, the water can’t put out the fire from beneath the burning oil. The water must stay above the burning oil to cut off its supply of oxygen. Also, water under the layer of burning oil will become steam due to the strong heat of the flaming oil. This will consequently send the burning oil in all directions, thus spreading the fire.