Answer:
C. plagioclase
Explanation:
From the magma silicate crystals are formed successively when the magma temperature reaches the typical melting temperature for each type of crystal. The first crystals formed at high temperatures can then change their composition or dissolve again. In this way the crystals already formed contribute their ions, molecules and atoms to magma and combine again forming new crystals whose melting temperature is lower than that of the first crystals formed. The new crystals are said to be stable at the lowest temperatures set now. These processes of change are called reactions. As several successive reactions occur as the magma temperature decreases the ordered series of reactions is called the BOWEN series in honor of the Canadian scientist who formulated this concept. There are two types of reactions, the continuous reaction and the discontinuous reaction.
<u>
By continuous reaction a crystal formed at high temperatures such as a plagioclase rich in the Ca2 +</u> component gradually varies its composition by replacing a portion of the Ca2 + ions with the Na + ions and a portion of the Al3 + ions with the Si4 + ions. To maintain its neutrality, the replacement of Ca2 + by Na + is coupled with the replacement of Al3 + by Si4 +. The series of continuous reaction starts from the plagioclase rich in Ca2 +, passes through several plagioclase of intermediate composition towards the plagioclase rich in Na +
Answer: B. Subartic
Explanation: Good luck! :D
Answer:English, Spanish, French
Explanation:
The main language is English in America, 2 is Spanish, 3rd is French
Answer:
Explanation:
In geography, the five theme summarizes and distinctly categorizes the main scope of the discipline. These five themes are:
- Location
- Place
- Human-environment interaction
- Movement
- Regions
The location is the position of an object in place. It is usually expressed with some certain reference on the earth surface. All geographical data have locational attribute.
Place gives the name of a particular location. For example, the Eiffel tower is a place in Paris.
Human-environment interaction; humans interacts with the environment in a number of ways and also, the environment in return greatly shapes the activities of humans. Human beings have in recent time through their activities spiked global warming phenomenon, in return, the environment responded by a host of effects.
Movement is a key theme in geography. It refers to change in position of a body.
Regions are areas on the earth surface that shows a good uniformity in terms of their human and physical component which are interacting.
The chapter introduced you to the five theme geographers use to study and organize information about the world.
A frequently used theme is the theme
of 1._Region_______ that defines area using one or more common characteristics. These characteristics can be 2.____Human_______ the way people's actions and ideas change the earth. They can also be 3.___Physical_____ features of the earth the occur naturally, such as 4.___Precipitation____ the amount of rainfall an area receives.
The shape of a mineral´s crystal indicates its atomic structure.
Answer: atomic structure.