How to set conditional Gradle properties?

Which set of rock properties are found in the highest quality aquifers? (SCIENCE HW HELP PLEASE!)?

• 1. Which set of rock properties are found in the highest quality aquifers? a. Low porosity, low permeability b. High porosity, low permeability c. High porosity, high permeability d. High porosity, low permeability 2. What will happen to the water table if withdrawal exceeds recharge? a. Water table stays the same b. Water table falls c. Water table rises 3. Which of the following has the highest permeability? a. Sand b. Conglomerate c. Gravel d. Sandstone 4. Why are wetlands important? a.They provide habitat b. The reduce flooding c. They filter pollutants d. All of the choices are correct. 5. Which rock property is associated with void spaces? a. Permeability b. Perkability c. Porosity 6. Which rock property is associated with connected spaces? a.Permeability b. Perkability c. Porosity 7. Which of the following processes will reduce porosity of materials? a. Fracturing b. Dissolution c. Compaction 8. Which of the following materials should have the highest permeability? a. Gravel b. Sandstone c. Conglomerate d. Sand 9. In order to get good production, how deep should a water well be drilled? a. To the water table. b. To below the water table. c. To above the water table. 10. Which type of aquifer flows without being pumped? a. Aquitard b. Artesian c. Closed d. Open

• Answer:

  1. C - because there must be room within the pore spaces for water to flow 2. B - water table falls 3. D - Sandstone - because just sand and gravel aren't lithified so they don't fit the definition of permeability, and Conglomerate has a low permeability. 4. Not so sure, either a or d, but try to use your judgment to solve this one. 5. C Porosity - because it entails that the rock has "pore spaces" - or void spaces, and Permeability only refers to the ease with which water flows through rock. 6. Sorry don't know about this one. 7. I would say C - compaction because it would crush the pore spaces making the rock denser. 8. Same as 3 9. B - to below the water table because during a time of drought the water table will drop 10. B - artesian. this is when ground water is being forced upwards towards the surface.