Answer:
Explanation:
Seashells are the exoskeletons of mollusks such as snails, clams, oysters and many others. ... Mantle tissue that is located under and in contact with the shell secretes proteins and mineral extracellular to form the shell. Think of laying down steel (protein) and pouring concrete (mineral) over it
One of them is run by the government entirely and the other involves very little government interaction
Is this a phone number calling you that you're trying to identify?
Answer:
As rocks on the earth go through various cycles, similarly the variation in chemical take place.
Explanation:
- As there exists a difference in the composition of minerals chemical composition from there pure forms, some variation exists in the chemical composition of elements like the size of irons, ad the temperatures at which the crystal grows.
- As rocks are an aggregate of more than one mineral they have distinct qualities like the granite is defined by the by proportions of quartz, and feldspar. Like the coal is a sedimentary rock being composed of carbon.
- The presence of oxygen, silicon, magnesium, calcium, and sodium in rocks defines their constituents, as by far Oxygen and Silicon is two of the most dominant 47% and 28%.
- An example of chemical alteration on earth is the volcanic rocks that are both igneous and metamorphic Depending on the chemical properties of these rocks the various metallic nature of elements the rocks have different temperatures and magnitudes.
The Industrial Revolution created a mass rural-urban migration
