Judge about the continued intensive farming in the Great Plains in connection with the experience of the Dust Bowl syndrome.

Suggest two reasons why irrigation is important for human development of the desert (4 marks)

Which of the following can scientists estimate geologic time? a. observing rock sequences b. radiometric dating c. comparing fossils d. all of these

The action of eventually a low island to form. a. wind b. waves c. volcanoes d. tectonic plates