An igneous rock forms quickly. Which characteristic could the rock have?(1 point)
1. evidence of folding
2. smooth, sharp texture
3.large mineral crystals
4.small sand grains
2. smooth, sharp texture
An igneous rock forms quickly, and therefore, it is most likely to have a smooth, sharp texture (option 2).
The characteristic that an igneous rock that forms quickly could have is option 4: small sand grains.
To explain how to arrive at this answer, it is necessary to understand the process of how igneous rocks form. Igneous rocks are formed from the cooling and solidification of molten magma or lava. The rate of cooling affects the size of the mineral crystals or grains in the rock.
If the cooling process is slow, the minerals have more time to grow, resulting in larger mineral crystals. Conversely, if the cooling process is rapid, there is less time for the minerals to grow, leading to smaller mineral crystals or even no crystals at all. Instead, the rock may have a glassy texture or contain small sand-like grains. This is why option 4, small sand grains, is the characteristic that best fits an igneous rock that forms quickly.