Something is ribbed if it has a raised pattern on it or markings that look a bit like ribs.
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.
You ride something when you sit on or in it and it takes you places, or does something interesting. Usually you ride a bike or a horse to go somewhere, and you ride something like a Ferris wheel or other fairground ride for fun.
A rifle is a type of weapon that is designed to be fired while supported by your shoulder, unlike small guns which are simply held in your hand. Rifles are most often used for hunting, or by the military. Older rifles could only fire one bullet at a time, some modern rifles fire in bursts, or can fire continuously.
