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:
latitudes that are (a) and (b)
longitudes that are (c) and (d)
Explanation:
we get here line of latitudes that are
for
(a) N 34 08' 44.9"
it is north 34 degree 8 minute 44.9 seconds
it is Northern Hemisphere
and
(b) S 18 09' 30.3"
it is south 18 degree 9 mint 30.3 seconds
it is Southern Hemisphere
and
here
(c) E 10 25' 41.3" and ( d) W 118 07' 02.3"
they are not at line of latitude
they are at line of longitude because east and west
as we know that N and S are at Latitudes
and E and W are at longitudes
Strengths Perspective is not a practice use by social workers gain cultural competence in their practices with different groups.
<h3>What is Social workers?</h3>
Social workers refer to people who study social work as a disciple or profession which entails the study of people, individuals, families, groups, communities, and society as a whole in order to meet their basic needs and enhance social functioning, self-determination, collective responsibility, good health and their general wellbeing.
Therefore, Strengths Perspective is not a practice use by social workers to gain cultural competence in their practices with different groups.
Learn more about Social work from the link below.
brainly.com/question/13296433
Idk go on google in find out
The tundra is a biome on the Earth that covers approximately 20% of its land mass, and it is almost exclusively located in the Northern Hemisphere. It is an environment that helps in the regulation of the CO2 in the atmosphere, and it is one of the biggest natural CO2 sinks. The living organisms in the tundra, are using the CO2 for their needs, thus removing parts of it from the atmosphere, and when they die, because the tundra is cold, and the decomposition is very slow, most of the CO2 remains trapped, and doesn't go into the atmosphere.
Unfortunately, the global warming is slowly changing the tundra, and prolongs the summer periods, thus reducing the permafrost period of the year, so the decomposition of the living organisms is getting quicker, and also bigger percentage of the CO2 from them gets to the atmosphere.
