http://www.discovery.com is an example of a _____.
Computers recognize a certain set of _____ which form the computer language.
What is the name of the layer of Earth's atmosphere that absorbs harmful ultraviolet rays coming from the sun?
Which is the part between core and crust of the Earth?
18 trees. 6 rows. How many trees in each row?
A ____ is used to feed photos and videos into the computer.
Birds can be identified by their .