Let's go through your questions one by one.
Question 17: What kind of mining involves removing the outermost layer of vegetation, soil, and rock to extract a mineral deposit?
The correct answer is:
d. Surface mining
Surface mining is characterized by the removal of the outer layers (vegetation, soil, rock) to reach mineral deposits beneath.
Question 18: What is the term for rock waste that remains after the desired mineral has been extracted?
The correct answer is:
b. Tailings
Tailings refer to the waste material left after the extraction of valuable minerals, often stored in ponds or piles.
Question 19: The following are PROBLEMS associated with mining EXCEPT...
The correct answer is:
e. The minerals mined out of the ground are vital to 90% of the things we need/use on a daily basis.
This statement highlights the importance of minerals rather than a problem associated with mining. The other options discuss various negative effects of mining.
Question 20: Match the Front with its proper description.
From your description, we match:
-
Column A #1 (When one cooler air mass takes over a warmer air mass with force, creating a cumulonimbus cloud and bringing thunderstorms.)
- The correct match is a. Cold Front
-
Column A #2 (When two air masses meet and neither one overtakes the other, resulting in a standstill front that can bring days of rain.)
- The correct match is c. Stationary Front
So the matches are:
- #1 - a. Cold Front
- #2 - c. Stationary Front
If you have any more questions or need further explanations, feel free to ask!