Below you can find the It naturally travels in a straight line & travels at the fastest speed of anything we know Jeopardy Words Answer. The answer to It naturally travels in a straight line & travels at the fastest speed of anything we know has 5 letters. This clue belongs to the Physical science category and is part of Jeopardy Word Level 2630. If you scroll near the bottom you will find other clues and answers part of level 2630