What are the maximum and minimum dimensions (the size range) for the following particle sizes?

a) cobble:

b) pebble:

c) sand:

PLEASE HELP

A

a) cobble: The maximum dimensions of a cobble are generally around the size of a rock that can be easily carried by a human, which is about as big as the world's largest funny-shaped potato. The minimum dimensions of a cobble would be anything larger than a pebble that makes it still impossible to put in your pocket without causing pants malfunctions.

b) pebble: The maximum dimensions of a pebble are small enough to fit comfortably in your hand, but not so small that you can accidentally swallow it while talking animatedly. The minimum dimensions of a pebble are anything bigger than a grain of sand that you can easily kick out of your shoe without tripping and falling on your face.

c) sand: The maximum dimensions of a sand particle would be anything so tiny that if you dropped it in your neighbor's yard, they wouldn't even notice, like a speck of glitter at a rave. The minimum dimensions of sand would be anything larger than a dust particle that you can still feel between your fingers and stubbornly find weeks later in the most inconvenient places, like the inside of your socks.

To determine the maximum and minimum dimensions for the particle sizes mentioned, you can refer to established classification systems or general guidelines used in the field of geology. In this case, we will use the widely accepted Unified Soil Classification System (USCS) to provide a rough estimation for the dimensions of each particle size.

a) Cobble:
According to the USCS, cobble-sized particles have a diameter ranging from 64 mm (2.5 inches) to 256 mm (10 inches). A cobble is typically larger than a pebble but smaller than a boulder.

b) Pebble:
Pebble-sized particles are larger than sand but smaller than cobbles. They have a diameter ranging from 4 mm (0.16 inches) to 64 mm (2.5 inches), according to the USCS classification.

c) Sand:
Sand particles fall into a range of sizes. The USCS categorizes sand into various classes, which differ in terms of their grain size. Here is a general breakdown based on the USCS:

- Very Coarse Sand: 2 mm (0.079 inches) to 1 mm (0.039 inches)
- Coarse Sand: 1 mm (0.039 inches) to 0.5 mm (0.02 inches)
- Medium Sand: 0.5 mm (0.02 inches) to 0.25 mm (0.01 inches)
- Fine Sand: 0.25 mm (0.01 inches) to 0.125 mm (0.005 inches)
- Very Fine Sand: 0.125 mm (0.005 inches) to 0.0625 mm (0.00246 inches)

Keep in mind that these dimensions are approximate and can vary slightly depending on the specific classification system being used or the field of study. Additionally, certain organizations or industries may use slightly different size ranges, but the ones mentioned here are widely accepted and commonly used.

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http://geology.about.com/od/sediment_soil/a/sedimentsizes.htm