List in order from smallest to largest the grain sizes used to describe detrital sedimentary rocks.

The grains from smallest to the largest are as follows-

(1) Clay (Diameter, D< 0.004 mm in diameter)

(2) Silt (D= 0.004 to 0.0625 mm)

(3) Sand (D= 0.0625-2 mm)

(4) Gravel (D= 2-4 mm)

(5) Pebble (D= 4-256 mm)

(6) Cobble (D= 64-256 mm)

(7) Boulder (D> 256 mm)

These sediments are weathered from the source rock and are transported from the source area to a different place and then they are compacted and lithified as a result of which detrital (clastic) sedimentary rocks are formed. For example, sandstone, siltstone, sandstone, conglomerate and breccia.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).