angle: The space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet. atmosphere: The envelope of gases surrounding Earth, another planet or a moon. disk: A round, flat and usually fairly thin object. drag: A slowing force exerted by air or other fluid surrounding a moving object. It involves friction. But unlike simple friction, it increases with an object’s speed. drone: A remote-controlled, pilotless aircraft or missile. engineer: A person who uses science and math to solve problems. As a verb, to engineer means to design a device, material or process that will solve some problem or unmet need. fabric: Any flexible material that is woven, knitted or can be fused into a sheet by heat or compression and drying. football field: The field on which athletes play American football. Owing to its size and familiarity, many people use this field as a measure of how big something is. A regulation field (including its end zones) runs 360 feet (almost 110 meters) long and 160 …