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.
Most liquid cooking oil is a better option than butter or margarine, but some types of cooking oil are healthier than others. What makes a cooking oil healthy or unhealthy is the amount and type of fat it contains. Healthy cooking oils are high in monounsaturated fats, which are some of the healthiest types of fats and may help lower blood cholesterol levels. Cooking oils may also contain polyunsaturated fats, which are also healthy and can help improve heart health. Start your cooking oil selection with plant-based oils like: