1. how do fine grained and coarse grained rocks differ in texture.
2. describe the texture of a rock that formed both intrusvie and extrustively?
3. what does the color of an igneous rock tells us?

Explanation:

1. Rock texture refers to the orientation and arrangement of mineral grains in rocks. It deals with the shapes and sizes of the different minerals that are found in particular rock.

Fine grained rocks have small mineral sizes that can be sometimes very difficult to see using ordinary eyes. Therefore, we can describe their texture as being fine. In coarse grained rocks, the mineral sizes are large enough to be seen by the unaided eyes. Their texture is said to be coarse.

2. Igneous rocks that formed intrusively usually have coarse textures. Intrusive formation of an igneous body deals with the cooling and solidification of magma within the earth crust. For crystals to grow, the must must have enough time to aggregate around nucleation centers. This condition is favored in deep seated environment. Magma takes enough time cool and solidify, in the process, they form large mineral grains. Intrusive rocks are said to be phaneritic due to their large mineral grains.

Extrusive igneous rocks solidifies quickly and rapidly. They form rocks with fine grain. The minerals are usually poorly developed and microscopic in nature. They are said to be aphanitic.

3. The color of an igneous rock tells us about the minerals that are found in the rock. Mafic minerals usually impose a dark color on igneous rocks while felsic minerals are usually light in tone.

places of higher salinity. there are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. this evaporation removes water – when water vapour rises into the atmosphere, it leaves the salt behind, so the salinity of the seawater increases. this causes the seawater to become denser.