In order to produce a change in motion, a force must be a(n)…?

The air that we breath is made mostly of which gaseous molecule

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels. the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause, directly and indirectly, for such a rise in sea level is