Answer:
D. Metals
Out of the 118 elements only about 30% are not made of metal. This can be tested easily if you have household items that have metal in them or some that do not. Additionally you will need a magnet to tell if there is really metal.
B. A barrage stores water during high and low tides,when the water is released ,it turns the plant's turbine.
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Answer:
1077.3 molecular in 1.05*1026 molecules
