I'm not 100% sure but I believe its limestone from coral reefs
Rocks composed of evaporite minerals, such as halite and gypsum, are rocks formed by evaporation of fluids.
I don't know. Ask your science teacher.
sedimentary rocks
sedimentary
Chemical sedimentary rocks form from solutions (water with something in it).
sedimentary
limestone
metamorphic
Evaporites such as halite, gypsum, anhydrate and the evaporitic forms of carbonates such as calcite and dolomite which are all sedimentary rocks.
Evaporation is one of the 3 types of boiling.
The three kinds of rocks by their method of formation are IGNEOUS rocks, SEDIMENTARY rocks and METAMORPHIC rocks. Igneous rocks cool from magma or lava. Sedimentary rocks form by the deposition of particulates and silt. Metamorphic rocks form from rocks (usually sedimentary) that are compressed and heated underground.
The precipitation of minerals forms chemical sedimentary rocks. Examples include calcite deposits in vesicles in igneous rocks like pumice. The definition may be extended to include rocks formed by evaporation. Mineral Gypsum is formed this way.