Words that start with R

Things are in rows if they are in parallel lines, an equal distance apart. Things would be in a row if they are spaced equal distances apart, all facing the same way. When you take off your shoes outside someone's house, you line them up in a row.

Rubber is an interesting material that has some interesting properties, including of elasticity - it can be forced out of shape and will snap back to its original shape once you remove the force. Rubber can be made from either natural latex or manufactured synthetically in a factory.

Rubbish is another word for trash.

A Rubik's cube is a 3-dimensional puzzle invented in 1974. It has nine squares on each side. You can move parts of the cube around so that the colors get mixed up. When the puzzle is solved, each side will have all the squares the same color.

A rudder is a device that is used to steer a boat, hovercraft or aircraft. It works by changing the direction the air or water rushes past the vessel. Rudders are typically seen on the back of ships, behind the propeller. Rudders on airplanes are mostly to add stability rather than for steering.