________ biodiversity in an ecosystem leads to ________ long-term stability and productivity.

In the mid-1800s Charles Darwin introduced the theory of _________ to explain how a new species could evolve from an earlier species with different characteristics.

The zone of seasonally frozen ground that exists between the subsurface permafrost layer and the ground surface is called the

____________ form when glacial plucking and abrasion erodes stream-cut valleys.

__________ is solar radiation arriving at the Earth’s atmosphere and surface.

Which of the following is not a reason for deforestation in Brazil?

Air flowing from different directions to an area of low pressure, coming together, and being forced upward is an example of ________ lifting.

Solifluction and soil creep are similar except ________ occurs when soils become saturated with water.

If you want a map with a lot of detail of a small area you would choose

Estimates of future sea level rise are mostly due to