Which causes sand dunes to form

a. ocean waves

b. weathering from old rocks in the dessert

c. gravity?

What took place in Nicaragua after a cease fire was agreed to in 1990?

What is the dead zone in the gulf of mexico?

List three locations in the U. S. where you might find trilobite fossils.

How long would it take from bethlehem to sudan by train that travels 100 mph

What factors was likely responsible for the location of Europes first civilization?

The four main systems of the Earth are

What is a famous part of the savanna in Kenya and Tanzania called?

Match each place with the region in which it is located. Mount Scott Rich Mountain Tallgrass Prairie Reserve Alabaster Caverns Black Mesa Ouachita Mountains Gypsum Hills Wichita Mountains High Plains Sandstone Hills

What is the name for any side of a building that is intended to be looked at?

4. What is the most common element found in the composition of minerals?