Answer:
Quartz is not pure in this rock.
Explanation:
When quartz shows effervescence in contact with an acid, it means that it is not in its pure state, but rather related to other substances that may be cementing the quartz. This effectiveness is caused by substances that do not react like quartz, such as calcite.
In this case, we can conclude that in relation to the calcium-rich rock shown in the question above, the calcium is not pure, but it is likely to be related to calcite, or other material that does not react to acid.
C. a diversely populated country
Russia is not a diversely populated country..
A half-infinite line (also known as a half-line) with one of the two points and is commonly used to represent a ray. The endpoint of a ray is point S. The correct option is B.
<h3>What is a ray?</h3>
A half-infinite line (also known as a half-line) with one of the two points and is commonly used to represent a ray. It is assumed to be infinite.
Given that Two lines extend from point S to create a right angle. The vertical line extends from point S through point R. The horizontal line extends right from point S through point T.
Also, A third line extends right and up from point S through point U. This can be drawn as shown below.
Now, since all the ray starts from point S, therefore, the endpoint of a ray is point S.
Learn more about Ray here:
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A theory that states that Earth's <span>surface is made of rigid slabs of rock, or </span>plates<span>, that move with respect to each other. Alfred Wegener </span>could not explain<span> how </span>continents <span>drifted. The </span>theory of plate tectonics does explain<span> this and states that each </span>plate <span>moves over Earth's hot and semi-plastic mantle.
And the answer is the C. Of continents despite the dense oceanic.</span>
