B. 65
C. 80
D. 95
b. Mercury and Mars
c. Venus and Mercury
d. Mercury and Earth
increased supply of nonrenewable resources
increased reuse of resources
reduced solid waste
Increased profits for industries, reduced solid waste, and increased reuse of resources.
-durable and malleable
-more common than regular minerals
-sources of renewable energy
Precious metals are rare, naturally occurring metallic chemical elements. They tend to be less reactive than most elements, are usually ductile and have a high lustre. Precious metals have high economic value. Examples are: gold,silver and platinum. Gems on the other hand are minerals or rocks that can be cut, shaped, and polished into beautiful stones. Examples include emerald, ruby and sapphire.
Both precious metals and gems are rare and valuable.
Both precious metals and gems are _____.
-rare and valuable
-durable and malleable
-more common than regular minerals
-sources of renewable energy