Which of the following describe the process of deflation

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed

Which of the following characteristics define a state? check all that apply. a. a population of people b. a sovereign government that determines how a group of people is ruled c. an army, military, or police force d. a territory with set borders

In plate tectonics, why is the north american plate tectonically inactive?