Lake bed racing means racing cars on big, flat areas where lakes used to be. Because the ground is very flat and open, cars can go really fast safely.
Land speed means how fast a car can go on the ground. People try to make cars go as fast as possible on special flat places.
Moon is a famous company that makes parts for custom cars called hot rods. People like to put their stickers on their cars to show they use Moon parts.
Air to fuel ratio means how much air mixes with fuel in a car's engine. The best mix is about 14.7 parts air to 1 part fuel to make the car run clean and use fuel well.
Rich mixtures mean the engine uses more fuel than air. This helps the car make more power but uses more gas and makes more pollution.