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1. watery liquid secreted into the mouth by glands, providing lubrication for chewing and swallowing, and aiding digestion.
2. is the biological mechanism by which organisms adjust to new environments or to changes in their current environment.
3. any member of the group of vertebrate animals in which the young are nourished with milk from special mammary glands of the mother.
4.use science and math to understand and predict weather and climate.
5. the layer of air that surrounds the Earth and is comprised mainly of Nitrogen and Oxygen.
6.is the movement of one object around a center or another object, a forceful overthrow of a government by the people or any sudden or grand change.
7.an animal that feeds on other animals.
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