The dust bowl of the 1930s was caused by

earthquakes
erosion
fertilizer runoff
overgrazing
the clearing of grasslands
volcanic eruption

Match the graph type to its description. 1. uses symbols to describe information pie 2. compares different quantities at the same point in time line 3. compares increases and decreases in a quantity over a period of time bar 4. shows the relationship of parts to each other and to the whole pictograph

The declining axolotl population in mexico city is an example of in overcrowded cities. a. the surpassing of support capacity b. changes to natural environments and native species c. the lack of safe homes and tenured spaces d. the effects of a growing urban heat island

What are two australian geographical features that hindered early exploration? western plateau gulf of carpentaria great barrier reef great dividing range