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Science quiz/test Preparation
5 cards·by caelien.collier
What does natural mean?
not made by people.
what does manufactured mean?
Made be people
what is a mass structure?
A mass structure is made by pilling up or forming similar materials into a particular shape or
design
what is one advantage for a mass structure?
a mass structure is held in place by it's own weight.
what are the four key elements to avoid failure?
1) must be heavy enough to stay in place 2) must not be to heavy to compact the earth below it 3)
must be thick enough so it can't be pushed