Unit 6 Bronze

Question 1

Describe the Dust Bowl

Answer 1

An area in the Us that was devastated by extreme drought, soil erosion, and economic depression during the 1930s

Question 2

Explain the causes of the Dust Bowl

Answer 2

Decades of commercial agriculture got rid of the Great Plain’s native vegetation.

Many farmers pushed water resources to the limits.
Grew wheat which did not protect the ground against high winds

Ranchers allowed livestock to overgraze, exhausting the topsoil

Question 3

Describe some of the effects of black blizzards

Answer 3

They carried tons of soil from the Great Plains to the East Coast

This filthy air damaged people’s lungs, causing “dust pneumonia”

Piles of dirt were shoveled out of houses and away from barns

Cars and tractors were ruined

Question 4

Describe the goal of the Civilian Conversation Service

Answer 4

Taught special methods of farming-such as contour plowing, limited tillage, and terracing
This reduced erosion and guarded the soil, which was the service’s overall goal.

Question 5

What was Uranium named after and where does it usually occur

Answer 5

Source of power used to generate electric energy at nuclear power plants

Named after the planet Uranus

Question 6

Explain the difference btw open pit mining and subsurface mining? (Ask Mr. Cavallaro)

Answer 6

Open pit mining

-Uses explosives to break rock and soil covering uranium near the earth’s surface.
-Miners dig blah holes, fill them with dynamite (or other explosives). -Afterwards they blow it up, power shovels clear the rubble away . Finally Smaller shovels dig out the uranium ore

Subsurface mining

-Used if uranium ore lies far beneath the earth’s surface.

-Mining companies dig tunnels into deposits
Miners drill into tunnel walls to install explosives (which loosen the ore)

-Miners They load the ore into buckets, which are hoisted to the surface

Question 7

Describe what yellowcake uranium is

Answer 7

Where uranium is concentrated and purified to an oxide is called yellowcake

Question 8

Describe what enriched uranium is

Answer 8

Yellowcake (the oxide) is transported to a conversion plant and undergoes chemical reaction with fluorine.
The reaction produces uranium hexafluoride which goes to an enrichment plant (U-23 and U-238 are separated from each other, creation enriched uranium (has a high percentage of U-235 then most uranium