Could be pumice or scoria.
Andesite typically has a fine-grained texture with a mix of various minerals such as plagioclase feldspar and amphibole. It can appear as a dark gray to black rock with speckles of white or light gray minerals.
A boulder typically has a rough and uneven texture, with a coarse surface due to natural weathering processes like erosion and exposure to the elements.
Sand is composed of large, hard particles that have uneven surfaces, which contribute to its rough texture. When mixed in soil, these particles create a coarse texture that feels rough to the touch. The individual grains of sand do not compact easily, allowing for good drainage and aeration in the soil.
The two types of texture are tactile texture, which can be felt through touch, and visual texture, which is perceived through sight but does not have physical texture.
The natural texture of a handrail can vary depending on the material it is made from. Wood handrails tend to have a smooth or slightly rough texture, while metal handrails may have a smoother or more polished texture. Plastic handrails can also vary in texture, from smooth to textured for enhanced grip.
The rock you're describing is likely pumice. Pumice is a volcanic rock that forms when lava cools rapidly, trapping gas bubbles that create its characteristic hollow spaces. It is lightweight and has a rough, abrasive texture, making it useful for various applications, including exfoliating skin and as a lightweight aggregate in construction.
It is a very light baked texture but you can say that it is rough but not hard.
Light interacts differently with rough and smooth textures. Light on a rough texture scatters in many directions, creating a dull appearance with less defined highlights and shadows. In contrast, light on a smooth texture reflects more uniformly, creating sharp highlights and shadows, and a glossy appearance.
soft, quite light yet a bit rough and crumby
The difference between rough and smooth is the texture. Rough things have a bumpy, abrasive texture. Smooth things have are not rough.
The options for the question are:Smooth texture and light colorSmooth texture and dark colorRough texture and light colorRough texture and dark colorThe correct answer would be rough texture and dark color (4).
Pumice is a volcanic rock that is so full of gas bubbles that is it very light, and rough surfaced.
rough
The rock had a scratchy, rough texture.
rough or bumpy :)
It is rough and wet
ROUGH