Scientific name: hordeum vulgare
Barley is a crop grown mainly for animal food, and for making malt that is turned into beer and whiskey.
Scientific name: zea mays
Corn, or maize, is a type of grass. It grows taller than an adult man. Its seeds grow in a cluster, known as an ear or cob of corn. Corn can be cooked and eaten by itself, or ground into flour.
Millet is a general name given to a number of similar looking but unrelated grasses with small seeds that are used as animal food, or as human food. There are many different kinds of millet.
Scientific name: avena sativa
Oats are a cereal crop grown mainly for turning into rolled oats and oatmeal for making porridge. It is also used as animal feed, particularly for horses.
Scientific name: chenopodium quinoa
Quinoa is not a grass, but is grown as a cereal crop. It is more closely related to beets than wheat, and is a very good source of protein and nutrients. Quinoa seeds are usually eaten whole, cooked. The seeds have a bitter coating which needs to be removed before cooking.
Scientific name: oryza sativa
Rice is the largest crop grown for food in the world. Most rice is grown in China and India. Rice is a type of grass that grows to about a metre high. Rice needs a lot of water to grow, and in countries like Australia that have a low rainfall people are calling for rice growing to stop. Rice is usually eaten cooked plain, but can be prepared in a lot of different ways and served with lots of different foods. Rice can even be puffed, a little like popcorn.
Scientific name: secale cereale
Rye is a cereal very closely related to wheat. It is grown mainly to make flour from to make into rye bread. It is also used as animal feed and to make some kinds of whiskey.
Scientific name: sorghum bicolor
Sorghum is a type of grass that is grown for its seeds for food and also for fiber to make things from. It is grown mainly in Africa, and is used both for human and animal food. It can be popped like popcorn and can be made into couscous.