Types of minerals change in heated sedimentary rock. A record of biological time can be found in metamorphic rock. Matter changes state from liquid to solid to form igneous rock.

Answer 1

Several types of minerals can change in heated sedimentary rock, such as limestone. For example, calcite can be transformed into dolomite through the process of recrystallization. Other minerals like clay minerals can also undergo changes in their structure and composition when subjected to heat and pressure.

While metamorphic rock itself does not typically provide a direct record of biological time, certain types of metamorphic rock can contain fossils or other remnants of past life that can help in dating the rock formation. For example, some metamorphic rocks may contain fossilized plants or animal remains that provide evidence of the biological time.

Matter does change state from liquid to solid when forming igneous rock. Igneous rocks are formed from magma or lava, which are liquid rock materials. When magma/lava cools and solidifies, it crystallizes and forms igneous rock. The rate of cooling can influence the type of igneous rock formed, as fast cooling results in smaller crystals (fine-grained rock), while slow cooling allows for larger crystals to form (coarse-grained rock).