What periods were part of the paleozoic era a. mesozoic b. pennsylvanian c. cretaceous d. precambrian

Why are all maps distorted? when reading a map, why is it important to check the legend? what is the difference between longitude and latitude? identify the meridian at 0° longitude and the parallel at 0° latitude.

Which of the following terms describes the layers of air surrounding the earth ?

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution