Mining, Agriculture, and Pollution

Gangue minerals

• are valued for their rarity and durability.

• have no commercial value

• are the most difficult of all materials to mine.

• are native elements.

Reclamation is the process of

• removing coal from a subsurface seam.

• extracting ore minerals from gangue minerals.

• returning land to its original, or better, condition after mining

• protecting the habitats of local wildlife.

Tags

NGSS.MS-LS2-5

An alloy

• is composed of one pure metal

• is composed or two or more metals

• is composed of one metal and water

• is composed of two or more nonmetals

Crushed ore is melted at high temperatures to separate impurities from molten metal during a.

• open-pit mining

• hydrothermal solution mining

• smelting

• dredging

Tags

NGSS.MS-PS1-5

What is one property that may be used to distinguish metallic from nonmetallic minerals?

• cost to extract

• value

• carbon content

• electrical conductivity

An effective example of a conductive mineral would be

• a sample of diamond

• a sample of clay

• a sample of gypsum

• a sample of copper

All of the following are likely impacts to fracking except that it could

• poison groundwater

• impair wild landscapes

• threaten wildlife

• assist land reclamation

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

Placer deposits are most likely associated with this type of mineral

• gold

• sapphire

• coal

• salt

Tags

NGSS.MS-ESS3-1

Which of the following is not a valid reason as to why undersea mining has been largely unsuccessful to date?

• land-based mining tends to be more profitable

• the water depths are often too great to be effective

• hydraulic dredges can damage the seafloor and pollute water

• the ability to sift through the sand is difficult

Tags

NGSS.HS-ETS1-3

Coal is likely to be formed when

• plant matter is buried by sediment. Then the added weight creates heat and pressure, which converts the plants to coal

• ore is continually heated up to separate the coal from other minerals attached to the sample

• layers of dirt build up over time, creating a patterned rock to create the coal

• the land is reclaimed post mining activities