nacl, molecules are ionic bonding this is covalent
gallium has the lowest electronegativity.
a tropical cyclone's primary energy source is the release of the heat of condensation from water vapor condensing at high altitudes, with solar heating being the initial source for evaporation.
the secret energy source of a hurricane is the large latent heat of water.
tropical cyclones are like giant engines that use warm, moist air as fuel. that is why they form only over warm ocean waters near the equator. the warm, moist air over the ocean rises upward from near the surface.as the warmed, moist air rises and cools off, the water in the air forms clouds.
the ground water refers to water present in the under earth in the cracks or pores or similar spaces.we majorly depends upon this sources of water specially in rural area.
it in irrigation and also serve as drinking water supply.
the words or phrases which identify layer of ground water are:
a) water table: the uppermost water saturated layer
b) kettle lake: it is an underground lake (not ground water)
c) saturation zone : this is the zone of water below the water table
d) undergound lake: this is kettle lake (not ground water)
e) sink hole: not a layer of ground water
so the layers of ground water are
a) water table
b) saturation zone