Iodine.

Iodine is a chemical element. Its symbol is I. This element has its own isotopes.

Iodine can be black or purple in color. Also, it has a smell.

This mineral is found in some foods.

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Minerals.

Minerals, also known as mineral species are parts of rocks and chemical elements.

There are many different minerals. Calcium (Ca), phosphorus (P), and iodine are minerals, too.

These elements are found in the bowels of the Earth.

Minerals are used in various fields.

Source of image:

https://www.shutterstock.com/image-photo/pyrite-mineral-crystalpyrite-crystal-396999130

Soil.

Soil or earth is a mixture. In it there are many different minerals. Also, there are different types of soil.

In order for plants to grow on the ground, it needs to be looked after.

Animals can live in the soil.

Source of image:

https://www.shutterstock.com/image-generated/tomato-plant-planted-cross-section-soil-2478482439

Vitamins.

Vitamins and minerals are very important for human organism. Especially for little children who are growing. Vitamins stay in many different types of food. Example, fresh fruit and vegetables have many needed vitamins and minerals: iron, zinc, cobalt. Fish and meat also have needed vitamins and minerals.

Vitamin "D" is in fish fat, vitamin "K" is in green vegetables. So, human organism is in need of all types of food. But sometimes, some people have a power allergy on useful food. These people can eat other food where there is source of vitamins or minerals.

If person doesn't eat enough food where there are needed vitamins, he can get sick. Begin to exofoliate nails, hair fall out, headache. Especially at risk are people who sufferes from bulimia, If just exclude several vegetables then organism doesn't even feel it. Sometimes in useful food and beverage such as fish and milk, there aren't enough minerals. So vitamins can be bought in drugstore in pills.

All vitamins are named by Latin letters. Periodic table has vitamins and minerals and their chemical names. Example, Iron-Fe.

Source of image:

http://www.istockphoto.com/photo/fruit-mix-13375953?st=f2b05bc

Source of image:

http://www.istockphoto.com/photo/salad-35131842?st=c31ee06

Source of image:

http://www.istockphoto.com/photo/fish-oil-15539006?st=c31ee06