Igneous rocks are defined as formations made from solidified lava or magma.
When lava or hot Magma reaches the surface of the earth or a water body it quickly cools down and changes it's from from a hot liquid to a solid rock.
The chemical composition of Igenous rocks can vary depending on their location, cooling time etc.
However, most Igenous rocks contain some or all of the following minerals:
1. Quartz
2. Micas
3. Amphiboles
4. Olivines
5. Pyroxenes
6. Feldspathoids
7. Feldspars
The answer is soil degradation. It is an artificial evolution related to the local climate and vegetation. It is caused by the replacement of primary plant communities (known as climax) by the secondary communities. This replacement changes the humus composition and quantity, and affects the formation of the soil. It is directly related to human activity. Soil degradation may also be defined as any change or disturbance in the soil perceived to be deleterious or undesirable. In this question, the more the farmer worked, the more he incidentally changed the formation and structure of the soil which resulted in the decrease in his crop yield.
Answer:
Centroid = (5, 1)
Explanation:
Given:
S(5, 5), T(11,−3), U(−1, 1)
Required:
Coordinates of the centroid of the triangle
SOLUTION:
Formula for centroid for coordinates to find the centroid of a triangle = 
Where,
Plug in the values into the formula:
Centroid = (5, 1)
Answer:
Angle ECA=68°
Explanation:
To solve, set the two angles equal to each other.
14x-2=12x+8
Now, we need to make the x's go to one side of the equation. This is because we need the x's to equal something. Otherwise, we can't solve. To do this, I am going to move 12x to the right. Remember, if a number is positive on one side, it will be negative when you move it to the other.
2x-2=8
Now, we need to add two to both sides.
2x=10
Now divide both sides by 2.
x=5
Now to solve, plug in 5 for x.
14(5)-2= ?
70-2=68
Angle ECA=68°
