| artery |
Arteries are natural tubes inside your body that carry blood from your heart to other parts of your body. Blood in your arteries is red. |
| arthropod |
An arthropod is a kind of animal. Arthropods have hard shells on the outsides of their bodies and no bones inside their bodies. They often have six, eight, or ten legs, and their legs are made of parts that are joined together. Some arthropods have even more than ten legs! All insects are arthropods. Spiders, scorpions, lobsters, and crabs are arthropods too. |
| article |
An article is something you can read in a magazine or newspaper. You can also find articles on a website or in some kinds of books. An article talks about real things. It is not a story that the writer has made up. An article is not usually very long. Sometimes it can fit on just one part of a page. A newspaper has many articles. |
| artist |
Artists are people who make things like paintings, drawings, music, or poems. An artist is a person who makes art in a serious way. Artists study and practice to do their work well. Artists usually want to show their work to many other people. |
| art room |
In some schools, there is a room called an art room. It is a kind of classroom, and teachers teach students things like painting and drawing there. Things like brushes, paint, clay, glue, scissors, and paper are kept in an art room. |
| as1 |
We often use as when we are comparing things--when we are saying that things are the same or different. Let's say you are very smart, and your sister is as smart. This means there is no difference between how smart you two are. Let's say you are hungry, but your sister is not as hungry. This means that how hungry the two of you are is different, and you are hungrier than your sister. [5 definitions] |
| ash1 |
When you burn something completely, like a piece of wood, what is left is something called ash. Ash is a white, gray, or black powder. It is very soft. |
| ashamed |
When you are ashamed, you feel bad about something you did or said. Sometimes when you are ashamed, you have a feeling that you want to go away and hide from other people. [3 definitions] |
| Asia |
Asia is one of the seven largest areas of land on the earth. These areas of land are called continents. Asia is the largest of all the seven continents on our planet, and it is made up of about fifty different countries. Asia also has more people than any other continent. Many different languages are spoken in Asia. Some of them are Chinese, Japanese, Hindi, Bengali, Farsi, and Arabic. |
| Asian |
When something is Asian, it is from the continent of Asia, or it has to do with the people, cultures, or languages of Asia. |
| ask |
When you ask someone something, you want to find the answer to a question. [5 definitions] |
| asleep |
When you are asleep, your eyes are closed and your whole body is resting. You are sleeping. |
| assignment |
An assignment is work that someone gives to another person. When you get an assignment from a teacher, it is work that the teacher wants you to do. |
| astronaut |
An astronaut is a person whose job is to travel and work in space. |
| at1 |
When you are at a place, that place is the point where you are. You might be in that place, or on it, or just outside it. [3 definitions] |
| Atacama Desert |
The Atacama Desert is a very dry area of northern Chile in South America. The desert lies between the Pacific Ocean and the Andes Mountains. Few mammals can live in the Atacama Desert because it is so dry, but many birds visit or live there, including certain hummingbirds and a certain kind of penguin that makes its home near the ocean. Lizards, toads, and scorpions can be found in the Atacama too. |
| at all |
If you are not hungry at all, you are not even a little bit hungry. If you don't have any money at all, then you don't have even one penny. |
| Atlantic Ocean |
The Atlantic Ocean is one of the five oceans on our planet. An ocean is a large body of salt water that covers a very large part of the earth. It is much bigger than a sea or lake. If you want to travel from America to Africa or Europe, the fastest way is to cross the Atlantic Ocean. |
| Atlas Mountains |
The Atlas Mountains are a range of mountains in northern Africa. The Atlas Mountains lie between the Sahara Desert and the coasts of the Atlantic Ocean and the Mediterranean Sea. The mountain region is home to certain kinds of leopards, sheep, monkeys, badgers, and gazelles. |
| atmosphere |
All around the planet Earth are gases. These gases all together are called Earth's atmosphere. As our planet travels through space and around the sun, its atmosphere stays with it. Other planets can have an atmosphere too, but Earth's atmosphere has just the right mixture of gases for humans to live. Our atmosphere lets us breathe and also protects us from the strong energy of the sun. [2 definitions] |
| attach |
When you attach two things, you join them or stick them together. |