Great fractures in the earth's crust resulted in the creation, through subsidence, of an extensive rift valley system in East Africa.

True or False?

Why were efficient bureaucracies needed for the nation-state to develop?

A mineral forms from water at the edge of a lake. Which statements best describe this mineral? Check all that apply.

What is the function of the large, sheetlike pectoralis muscles of a bird it moves the tail to form a rutter system it anchors the feet when the bird perches it provides the wing upstroke it provides the wing's downstroke?

Match the following cards: (1) underground water sources (2) triangular land at the mouth of a river (3) a steep cliff or slope usually caused by faulting or erosion (4) a seasonal change in air circulation patterns that result in heavy wind and

Which of the following lake zones is similar to the coastal zone of the ocean? Benthic Limentic Littoral Profundal

Why has there been little progress negotiating agreements between riparian countries and those in need of water? No one wants to share limited resources. Countries do not want to negotiate with historic rivals.

What are the best places to go in Hamburg Germany?

Ancients noticed patterns in the motion of objects in the sky, which led to the development of units of time, like hours, days, weeks, months and years. Which of the following moves least in the sky regardless of the time period being considered?

Observations indicate that galaxies with more massive central black holes tend to also have

If there is a subduction zone, you would expect to find volcanoes. Locate and name the volcanic mountain range (on the North American continent) and list the names of two specific mountains.