A word root is the base part of a word (i.e., less any prefixes and suffixes).
To change the meaning of a word, a prefix can be added to the front of the word root, or a suffix can be added to the back. Quite often, a prefix and a suffix are added to a word root to change the meaning. (Prefixes and suffixes are known as affixes.)
Nitrogen 75%
Oxygen 21%
Other gases exist in lesser quantities
Answer:
1 and 2 is the same as 2 and 4
Explanation:
im asian
Answer:
The difference between a submarine and a submersible is a submarine has enough power to leave port and come back to port under its own power. A submersible has very limited power reserves so it needs a mother ship that can launch it and recover it.A submersible is a small watercraft designed to operate underwater. The term submersible is often used to differentiate from other underwater vessels known as submarines, in that a submarine is a fully autonomous craft, capable of renewing its own power and breathing air, whereas a submersible is usually supported by a surface vessel, platform, shore team or sometimes a larger submarine. In common usage by the general public, however, the word submarine may be used to describe a craft that is by the technical definition actually a submersible. There are many types of submersibles, including both manned and unmanned craft, otherwise known as remotely operated vehicles or ROVs.Submersibles have many uses worldwide, such as oceanography, underwater archaeology, ocean exploration, adventure, equipment maintenance and recovery, and underwater videography.
