Igneous rocks form when magma or lava cools and hardens into a rock. Magma and lava are rocks that are so hot they move like a liquid. Magma is molten rock that is underground; lava is molten rock that is above the ground â and that is the only difference between them.A common igneous rock is granite.gneous rocks form when magma or lava cools and hardens into a rock. Magma and lava are rocks that are so hot they move like a liquid. Magma is molten rock that is underground; lava is molten rock that is above the ground â and that is the only difference between them.
In partial hydrogenation, the resulting fats are semi-solid at room temperature. In full hydrogenation, the oils become completely solid. The problem with partially hydrogenated oils is that they contain trans fat, which raises LDL (âbadâ) cholesterol, lowers HDL (âgoodâ) cholesterol and has other harmful effects. In contrast, fully hydrogenated oils, in essence, become saturated fatsâbut they contain no trans fat.
Vegetable oil is healthy before it is hydrogenated â a process that requires adding hydrogen to unsaturated fats.Oils that are often hydrogenated are soybean oil, corn oil and cottonseed oil. After healthy oils are hydrogenated, they are unhealthy because they are high in trans fats.egetable oil is healthy before it is hydrogenated â a process that requires adding hydrogen to unsaturated fats.