Which of these is an environmental change that occurs very quickly?

A. Succession

B. Deforestation

C. Global warming

D. Regrowth after volcanic eruption

The diagram below shows the processes which created life on Earth.

Subsaharan Africa shares which one of the following physical traits with North America?

Both Greek and Enlightenment philosophers believed that humans

This word for a bug or malfunction was popularized in the 1962 book into orbit by the mercury astronauts

a 3cm times 3cm rectangle sits inside a circle with a radius of 4cm what is the area of the shaded region

Choose the state and capital that border the east coast of the United States.

Trees in deciduous forest do what? A. Shed leaves during one season B. Grow in a warm Mediterranean climate C. Have needlelike leaves D. Grow in a climate that is cold year round

How many miles long is the great wall of china

What landforms are created at convergent boundaries?

In which direction does the Sun appear to move across the sky? Ofrom west to east from east to west from north to south from south to north