13.

when a solid, liquid, or a gas changes from one physical state to another, the change is called

group of answer choices

entropy

evaporation

phase change

melting

freezing

The blank theory suggests that the sun, planets, and other celestial bodies of the solar system came from a cloud of dust and gas? a.) condensationb.) steady state c.) big bang d.) nebular

Based on this map, which statement about africa’s economic activity is most accurate? a) coastal countries are all members of opec b) economic development is more common with opec nations c) coastal countries have more access to productive resources d) economic development is more common above the sahara desert

Which region was the hearth for the largest number of agricultural animals such as pigs sheep and cows