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How do you know if a rock has been in a river?
The force of the water will have worn it smooth, with no sharp edges.
What part of a rock does weathering attack most rapidly?
The most rapid weathering occurs at the sharp edges and corners of rock.
Is the flint rock very hard?
Yes, slithers of which, when broken from a bigger lump (known as 'knapping') have sharp cutting edges.
Why knives scissors and nails have a sharp edges?
Knives and scissors have edges to cut things, but nails do not have sharp edges, they have points to penetrate hard surfaces.
What are a mix of of sharp angular pebbles?
A sedimentary rock called "breccia". The sharp angular pebbles making up the breccia could be igneous, sedimentary, or metamorphic. Breccias generally form close to the point of origin of the clast rock, having less time to round those sharp angular edges.
What process causes a rock with sharp edges to have rounded edges?
Abrasion
What rock is actually glass and has sharp edges?
Obsidian is a natural volcanic glass with potentially sharp fracture edges.
What sedimentary rock made up of rock fragments with sharp edges?
breccia
How do you know if a rock has been in a river?
The force of the water will have worn it smooth, with no sharp edges.
What part of a rock does weathing attack most rapidly?
Weathering attacks the surface of the rock most rapidly.
What part of a rock does weathering attack most rapidly?
The most rapid weathering occurs at the sharp edges and corners of rock.
Why do river stones round out?
Sharp edges are knocked off by the tumbling effect created by moving water, much as a mechanical rock polisher does via a rotating drum. As more and more sharp edges are rounded, and as the rock is abraded by much smaller rock particles being transported by running water, the effect is a rounded smoothed rock surface.
Is the flint rock very hard?
Yes, slithers of which, when broken from a bigger lump (known as 'knapping') have sharp cutting edges.
Why knives scissors and nails have a sharp edges?
Knives and scissors have edges to cut things, but nails do not have sharp edges, they have points to penetrate hard surfaces.
What are a mix of of sharp angular pebbles?
A sedimentary rock called "breccia". The sharp angular pebbles making up the breccia could be igneous, sedimentary, or metamorphic. Breccias generally form close to the point of origin of the clast rock, having less time to round those sharp angular edges.
Why do rocks fragments carried by glacier not lose their sharp edges?
The rocks are frozen solid therefore there Sharp edges are not lost
What rocks are a mix of sharp angular pebbles?
A sedimentary rock called "breccia". The sharp angular pebbles making up the breccia could be igneous, sedimentary, or metamorphic. Breccias generally form close to the point of origin of the clast rock, having less time to round those sharp angular edges.
