Slumps are ____
a. rotational slides of earth
b. linear flows of ice and snow
c. slow creep of rock
d. small avalanches of debris
a
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What are the possible methods to alleviate the future mineral-resource shortages?
a. Increase or extend mineral supplies b. Explore marine mineral resources c. Conservation of mineral resources d. Develop new techniques that use fewer minerals e. Both a, b, and c
The dwindling supplies of rare strategic metals such as indium, tantalum, and platinum may be extended if we rigorously ________
A) relax environmental requirements for mining B) increase demand for the products in which they are used C) reduce demands for social and economic justice D) recycle existing supplies E) exploit known deposits more efficiently
The original large continental mass containing all of the present continents prior to separation million of years ago has been named _______.
a - Pangea b - Gondwanaland c - Laurasia d - Subduction e - transcurrent
How far is a light year?
A) nearly 10 trillion km B) the distance of one Earth orbit C) 300,000 km D) all of the above