TRUE OR FALSE

Question

____________________ 18. Subsidence is caused by flooding caves.

________________19. Most pollution plumes spread extremely slowly, and time is available for alternate water supplies to be found.

____________________ 20. Most chemical contaminants can be removed easily from the groundwater and aquifers

____________ 21. If the recharge areas of confined aquifers are polluted, then the aquifer becomes polluted, too

Answer 1

Here are the answers to your true or false statements:

18. FALSE - Subsidence is typically caused by the collapse of underground voids, such as those formed by mining activities or the drainage of groundwater, rather than flooding caves.

19. FALSE - Pollution plumes can spread at varying rates, and many can spread relatively quickly, often leaving limited time for finding alternate water supplies.

20. FALSE - Many chemical contaminants can be difficult to remove from groundwater and aquifers; some may require extensive treatment processes.

21. TRUE - If the recharge areas of confined aquifers are polluted, the contaminants can eventually make their way into the aquifer, leading to pollution there as well.