surface

The outer parts or appearance of something

The inside part of something, like a room or box

Under the ground or below the top layer of a place

To look below the surface to find the real reasons

A feeling that is hidden but easy to notice

A weapon launched from the ground to hit targets in the air

A weapon launched from the ground or a ship to destroy aircraft in the sky

The outer layer of the Earth that includes land and oceans where life lives

The total outside area of a solid object or a specific area inside a border

A force that makes a liquid surface pull together like a skin

A flat surface like a table or countertop where you do work

A military ship that moves and fights on the water's surface, not underwater

The top layer of a road that vehicles drive on

A movable part on a plane that the pilot moves to steer or keep it steady

The top side of an object that you can touch or see

A wall or other area that stands straight up from the ground

A weapon or missile a plane uses to hit targets on the ground

A weapon that a plane fires to hit a target on the ground

An area of closely cut grass around a golf hole where players hit the ball toward the hole

A flat area covered with hard material like concrete or stones

A soft background sound made when a record player's needle rubs a vinyl record

A set of weapons and equipment that shoots rockets at planes

A pull at the surface between two liquids that do not mix, like oil and water

A U.S. Navy center that develops and tests weapons and systems for ships

A surface in three-dimensional space made by an equation with squared terms in x, y, and z

A shape formed when a straight line moves through space

A forest fire that burns leaves and small plants, not large trees

An instrument with a pointed tool on an adjustable stand used to mark and check flat surfaces like metal plates

Small amounts of gas or liquid stick to a solid surface and form a thin layer

The part of science that studies how substances act where two materials meet, like liquid and air

A machine in power plants that cools steam from a turbine and turns it into water

A machine that pulls skiers up a slope while they stay on the ground

The top layer of ground that has the most plant food

A chemical in soaps and detergents that helps water mix with oil

Letters and packages sent by land or sea instead of by air

Equipment on a ship that finds and follows other ships

Causes liquids or tiny bits to stick to a surface

A smooth, non-stick coating that keeps food from sticking