PLTW 3.4 Vocab Rainfall

The ratio of the total amount of rain (rainfall depth) falling during a given period to the duration of the period.

The minimum moisture content, expressed as a percentage of the oven dry soil weight, at which the soil will begin to flow when subjected to a small shearing force. The _____ is determined using a standard _____ device.

A soil that displays a good representation of all particle sizes. For instance, _____ sand will contain a fairly even distribution of coarse, medium, and fine sand.

A number that indicates the portion of rainwater that will be discharged by a particular surface.

Incapable of being penetrated. 

Entrance or means to enter.

A pond that collects storm water, temporarily stores, and then slowly releases the water into the municipal storm water system.

The maximum angle of a stable slope of a granular material determined by friction, cohesion, and the shapes of the soil particles.

The period of time over which rain is measured. For example in the case of annual rainfall measurements, the ____ is one year.

Exit or a way out.