The following statements about mining is true: Mining allows useful minerals to be extracted from the Earth. Correct answer:D
Mining has a large impact on the environment because minerals are contained within the Earth. The long term effects of mining include acid drainage
, erosion
and dust emissions.
Answer:
Option (4)
Explanation:
Assimilation is defined as the process by which the new magma is produced from the previously existing magma when interacts with the surrounding host rock. This process alters the original composition of the magma. This generally takes place when the magma reacts with the wall rocks, and due to the high temperature, there incorporates other minerals and substances that are easily melted and mixed with the magma.
Thus, the correct answer is option (4).
Condensation is responsible for the formation of clouds because it is the process by which water vapor in the air is changed into liquid water, thereby forming clouds.
1 cm to 1,00,000 cm. As 1 km represents 1,00,000 cm. That's why 1 cm to 1 km.
<u>Explanation:</u>
Scale represents the ratio between map distance and ground distance. Representative Fraction, Graphical scale, Linear scale and Comparative scale, Statement scale all are various categories of scale.
In Representative Fraction (R.F) values are represented in ratio format. Here, 1 cm map distance representing 1,00,000 cm ground distance. As 1 km= 1,00,000 cm. That's why 1 cm to 1 km means 1 cm map distance represents 1 km ground distance in reality.
Statement scale represents the values in a sentence. For eg. 1 cm to 1 km. Linear scale represents the values in primary and secondary divisions likewise Comparative scale compares two different units in a single scale.
