For water to enter ground, there must be A. Sufficient amount of sand in the soil
B. large enough spaces in the ground's surface material
C. soil particles clumping together
D. heavy precipitation

If the stream is carrying sand, large boulders, clay, and small pebbles which type of particles is deposited last as the stream begins to slow down?

A. small pebbles
B. clay
C. sand
D. large boulders

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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