environmental science test 3

Tsunamis are caused by 

• abnormally high and sustained winds

• abrupt changes in temperature of seawater

• the displacement of sea water by volcanoes, earthquakes or coastal landslides

• hot water entering the oceans from undersea faults

Placer mining involves the use of ________.

• screens or pans and running water

• draglines and heavy dump trucks

• seismic activators and thermal couplers

• explosives and support beams

Many types of mining, such as for coal, produce a specific type of water pollution called ________.

• eutrophication

• acid drainage

• suspended limestone particles

• sludge

Heavy landscape damage and water pollution have occurred in ________ as a result of ________.

• Florida; open pit mining of limestone

• Mississippi; strip mining for uranium

•  

  Appalachia; mountaintop removal mining for coal

• San Francisco; placer mining for gold

The dwindling supplies of rare strategic metals such as indium, tantalum, and platinum may be extended if we rigorously ________.

• relax environmental requirements for mining

• exploit known deposits more efficiently

• recycle existing supplies

• reduce demands for social and economic justice

Earth's mantle ________.

• is located in Pangaea

•  

  is the most dense layer and formed solely of iron

• is formed by plate boundaries

• surrounds the core as a thick, elastic rock formation

Plate tectonic movement results from ________.

• unstable surface rock formations

• high surface winds and erosion

• convective movements of rock in the underlying mantle

• mass wasting

A(n) ________ is a solid aggregation of two or more ________.

• mineral; rocks

• mineral; crystals

• rock; minerals

• crystal; rocks

________ forms when magma or lava cools.

• Metamorphic rock

• Igneous rock

• Sedimentary rock

• Polished rock

Sedimentary rock is formed ________.

• when magma and lava cools

• due to high heat and pressure

• as sediments are pressed together and infiltrated by minerals