Social studies 5

in the 1930s, a sever drought hit the _________ of north america

• mississippi river

• great plains

• sahara desert

• amazon jungle

________________ is a change in the average climate of a region over a long period of time.

A _______ which is a sandstorm which is a natural weather event that happen in desert region.

• thunderstorm

• rainstorm

• haboob

• sand erosion

__________ is the idea that people must protect natural resources so they will be around for the future to use.

• sustainability

• depletion

• pollution

• desalination

_________ is the expanding and building of cities.

______ is the largest megacity in the world.

• Sydney,Australia

• dubai, UAE

• riyadh,saudi arabia

• tokyo,Japan

A _______ is a very large city with a population of more than ten million people.

__________ refers to the amount of carbon dioxide released into the environment when people burn fossil fuels.

• Carbon footprint

• oxygen

• pollution

• depletion

_______ is the act of reducing the amount or quality of something.