Answer:
Sugar dissolving in warm water
Explanation:
There are two types of change in chemistry; physical and chemical changes.
A physical change is a type of change in which no new substance is formed while a chemical change is a type of change in which a new substance is formed.
Dissolving sugar in warm water is a physical change because no new substance is formed and you easily get the sugar back by evaporating the water
They are made up of big groups
Answer:
The city was a land route from Europe to Asia and a waterway between the Mediterranean and the Black Sea. The strategic geographic location of Byzantium protected it from attacks.
To protect people from national government
