Identify the characteristics of a unitary system, a federal system, and a confederate system. Provide at least one example or a unitary and a federal system.

How do ocean currents affect temperature? check all that apply. they carry cold water from the poles to the equator and cool air over land. they flow north and then south below the equator. they flow south and then north above the equator. they move warm water from the equator to the poles and heat air over land. they move east to west and create prevailing winds. they move west to east and create seasonal winds.

While most people who lived in ancient egypt and the middle east avoided settling in nearby deserts, those regions protected them from their enemies. why do you think this was true?

Why the moon is not visible from earth during the new moon ?