| air |
When you air a room, you open doors and windows so that air can move through it. You air a room to take away smoke, dust, or things that smell bad. When you air something like a pillow or rug, you put it outside so that it will smell cleaner. [1/4 definitions] |
| air conditioner |
a machine that cools the air in a room or car. An air conditioner also takes the dust and dampness out of the air. |
| air conditioning |
a system that cools air and takes dust and dampness out of it. Air conditioning is used inside buildings and cars. |
| asteroid |
Asteroids are chunks of rock that travel around the sun in the same way as planets travel around the sun. Asteroids can be as big as 600 miles across or as small as a single piece of dust. Most asteroids are found between the orbits of the planets Jupiter and Mars. |
| cloud |
something like a cloud, such as dust or smoke. [1/5 definitions] |
| comet |
an object in space that travels around the sun. A comet is made up of dust and gas, and sometimes forms a long, bright tail. |
| dirt |
any dirty material such as mud or dust. [1/2 definitions] |
| dust |
to clean or wipe dust from. [2/3 definitions] |
| dustpan |
a flat pan shaped like a small shovel with an attached handle. It is usually made of metal or plastic. A dustpan is used for gathering up dust or dirt while sweeping with a broom. |
| dust storm |
a storm of very strong winds that sweep up dust from the land. Dust storms can occur when the land has become very dry from lack of rain. |
| dusty |
full of or covered with dust. [2 definitions] |
| earwax |
Earwax is a substance that is produced in your ears. It is brownish yellow and somewhat sticky. Your ears produce earwax as a way to protect the inside of your ears from things like dust or bacteria. Earwax catches these tiny things before they can go further into your ear. |
| eddy |
a small current of water, air, fog, or dust that spins against the main current. [1/2 definitions] |
| eyelash |
The little hairs that grow from the skin around your eyes are called your eyelashes. Your eyelashes help protect your eyes from things like dust. |
| film |
A film is a thin layer of something. A film of dust on a surface is a thin coat of dust over that surface. [1/4 definitions] |
| fine1 |
When something is fine, it is made up of very, very tiny bits. Wheat is crushed into very tiny bits to make it fine enough for flour. Dust and powder are also things that are very soft and fine. [1/6 definitions] |
| goggles |
a special pair of glasses with a secure frame that one wears over one's eyes to protect them from harsh or dangerous things, such as dust, wind, sparks, or hazardous chemicals. |
| haze1 |
mist, smoke, or dust in the air, making it hard to see. |
| layer |
A layer is something that is spread out over a surface. When dust covers a table, we can say there is a layer of dust on the table. Sometimes there is one layer of something over another layer of it, like when there is one layer of cement over another layer. [1/2 definitions] |
| mask |
a covering for the mouth and nose to protect the wearer from germs, poisonous gases, dust, or the like. A mask is also used to protect other people from one's own germs. Some kinds of masks are used to provide oxygen or other breathable gas to the wearer through an attached tube. [1/6 definitions] |
| nebula |
a cloud of dust or gas found between the stars. A nebula may seem either bright or dark, depending on how it reacts with light. |