Plant and animal cells. Cytoplasm. Jelly-like substance, where chemical reactions happen. In plant cells there's a thin lining, whereas in animal cells most of the cell is cytoplasm. Plant and animal cells. Nucleus. Controls what happens inside the cell.Carries genetic information. In exams don't call the nucleus the 'brain' of the cell.ytoplasm. Jelly-like substance, where chemical reactions happen. In plant cells there's a thin lining, whereas in animal cells most of the cell is cytoplasm. Plant and animal cells. Nucleus. Controls what happens inside the cell. Carries genetic information. In exams don't call the nucleus the 'brain' of the cell.
Iron is rarely found in its pure form on the surface of the earth; as it tends to get oxidized when it comes in contact with atmospheric oxygen. For this reason, most of its ores are in the form of iron oxides.
It is magnetic. It is easy to mine and make, which is why it is so useful. Pure iron is soft and very malleable and is able to stretch a lot, while steel (iron mixed with a little carbon) is stronger and does not stretch as much as iron.t is used a lot because it is very strong and cheap. Iron is the main ingredient used to make steel. Raw iron is attracted to magnets, but it is not actually a magnet, however it can be used to make an electromagnet.