| condensation |
the act or process of changing from a gas to a liquid. [1/2 definitions] |
| condense |
to cause to change from a gas to a liquid or solid through cooling. [2/4 definitions] |
| convection |
the movement or transfer of heat through a liquid or gas because of the natural rising of the heated parts and sinking of the cooled parts. |
| deflate |
to cause to shrink or collapse by letting out air or gas. [1/3 definitions] |
| evaporate |
to turn from liquid into gas; pass away in the form of vapor. [1/2 definitions] |
| exhaust |
the smoke or gas given off by an engine. [2/4 definitions] |
| fermentation |
the chemical change of a sugar into alcohol. Fermentation produces gas bubbles. [1/2 definitions] |
| flame |
the mixture of burning gas and vapor that rises from an object that is on fire. Flame is seen as brightly colored, flickering light. [1/4 definitions] |
| float |
to rest on the surface of a liquid without sinking, or drift in a gas such as air without falling. [1/4 definitions] |
| fluid |
a liquid or gas. A fluid flows easily and takes the shape of the container that holds it. Water and air are fluids. [1/2 definitions] |
| fluorine |
a substance that is a chemical element. Fluorine combines easily with other elements to form compounds. Some of these compounds are used to prevent tooth decay. Fluorine is poisonous in its pure gas form. (symbol: F) |
| fossil fuel |
any carbon-containing fuel formed from the remains of prehistoric plants and animals. Coal, petroleum, and natural gas are examples of fossil fuels. |
| gas |
a form of matter that is neither liquid nor solid. A gas rapidly spreads out when it is warmed and contracts when it is cooled. [2/3 definitions] |
| gaseous |
in the form of or resembling a gas. |
| gas station |
a place where gas, oil, and other supplies for running a car can be bought; filling station; service station. |
| helium |
a gas that is one of the chemical elements. It is used to fill balloons and blimps because it is lighter than air. (symbol: He) |
| hydrogen |
a very light gas that burns easily and is one of the chemical elements. Hydrogen is the most abundant element in the universe. It combines with oxygen to make water, and it is found in all living things. Hydrogen combines with many substances and has many uses. (symbol: H) |
| intake |
the place at which a liquid or gas is taken into something. [1/2 definitions] |
| jet1 |
a stream of liquid or gas shooting from an opening, usually with great pressure. [1/3 definitions] |
| krypton |
a gas that is a chemical element. Krypton does not combine easily with other elements. (symbol: Kr) |
| laser |
a device that makes a strong, narrow beam of light by stimulating the atoms in a gas or crystal. |