Answer: These changes of state are physical changes
Explanation: changes between gas, liquid and solid phases do not alter the chemical or atomic state. Ice, water and water vapour all have the chemical formula H2O.
<span> Acids like acid rain that hits rocks and plants and affects them are examples of chemical weathering. Roots growing in cracks in rocks can also be considered to be physical weathering. </span>
Answer: minerals—pyroxenes, olivines, and feldspars—dominate the stony meteorites. Metals—kamacite and taenite—along with small amounts of schreibersite and cohenite dominate iron meteorites. The following list is a short guide to selected minerals found in meteorites.
Explanation:
Peptidoglycan is the answer
