Which of the following are two mechanisms for water pollution?

a. high and low

b. direct and indirect

c. lethal and nonlethal

d. harmful and innocuous

Where would you be most likely to find a freshet?

All of the following are reasons why many rivers are unnavigable in Africa except A. the Congo has a series of rapids. B. the Niger has a large, marshy delta and flows through dry lands. C. the Nile is too shallow. D.

What is it called when softer rocks wear away and leave harder rocks behind? a. abrasion c. differential weathering b. oxidation d. acidic weathering

This was the last imperial dynasty in Chinese history. A. Qin B. Qing C. Ming D. Han

What two processes move rocks around the planet?

Less developed nations are to extended families as more developed nations are to nuclear families. matrilineal families. families of procreation.

If star a has an apparent magnitude of - 6 and star b has an apparent magnitude of 5, which star is brighter in our sky?

What is one advantage of free trade?

Explain how the shading of the direct light of the sun causes a lunar eclipse.

Describe how modern science operates and distinguish it from philosophy, pseudoscience, and religion. In recognition of these distinctions, what individual (s) and methods mark the beginning of Astronomy as a science?