5B science quiz 3B

land that is given a period of rest to allow natural processes to replenish the nutrients in the soil

• ground cover

• crop rotation

• contour plowing

• fallow ground

prevents soil erosion in unused fields

• contour plowing

• fallow ground

• crop rotation

• ground cover

able to be dented or shaped

• malleable

• aluminum

• vein

• ore

a strong, lightweight metal that is the most abundant metal in the earth's crust

• iron

• copper

• aluminum

• steel

a concentrated area of specific minerals

• ore

• vein

• smelting

• gold mine

a process used to separate metal in ore from the other materials

• vein

• malleable

• ore

• smelting

a substance found naturally in the earth's surface that has never been alive

• mineral

• vein

• ore

• gold

valuable metal that often indicates wealth

• aluminum

• silver

• gold

• iron

a material that has usable amounts of metal in it

• vein

• ore

• mineral

• iron

prevents crops and soil from washing downhill

• ground cover

• fallow ground

• contour plowing

• crop rotation