X

There are no glossary terms that begin with this letter.

Y

yard (yd.)

A unit of length. One yard is 36 inches or 3 feet.

yardstick

A measurement tool that is used to measure length in yards. A yardstick is 36 inches or 3 feet. (See also yard.)

Z

zero

None; 0; the number before the number one. The number that shows there is no amount.

zero a balance

On a two-pan balance, making both pans level before you mass an object. For example, if the empty pans are not level, you can place a small piece of clay on the high end of the arm.