1. Which of the following methods may help conserve water by reducing the amount

Question

1. Which of the following methods may help conserve water by reducing the amount used for agriculture?
A. polyculture
B. construction of dams for irrigation needs
C. biological pest control
D. contour with no-till farming
E. reducing pesticide and fertilizer usage

2. Extensive irrigation may contribute to desertfication because
A. the water dissolves soil nutrients, making them unavailable to plants
B. water used in irrigation leaves behind toxic substances in the soil
C. runoff of water leaves silt deposits behind, which reduce the ability of plants to grow
D. a reduction of water available in the aquifer lowers lake, river, and stream levels
E. evaporation of water used in irrigation causes salinizatin of the land, reducing the ability of plants to grow

3. A disproportionately large percentage of resources in more developed countries (MDCs) goes to
A. growing crops
B. providing water
C. growing livestock
D. cleaning sewage
E. pest and weed control

4. In what ways does overfishing lead to decreased biodiversity?
A. It reduces the available habitat for other species
B. Overfishing allows fished species to overpopulate once the larger individuals are removed from the population, which in turn depletes the species' food source
C. Newer technologies allow the fishing fleet to take a larger catch while leaving larger numbers of breeding pairs, which overpopulate and degrade the environment
D. It depletes fish that feed on some species and serve as food sources for other species, leading to the eradication of some species and the overpopulation of others
E. It depletes food sources for aquatic mammals, which then overpopulate

5. Which of the following is a drawback to the use hydropower?
A. Hydropower consumes more fossil fuels than power planst fueled solely by fossil fuels
B. More countries derive more power from fossil fuels as compared to hydropower
C. Hydropower causes more pollution than fossil fuels, such as coal or oil
D. Hydropower is less efficient as compared to fossil fuels, such as coal or oil
E. Water levels below dams are reduced, and large dams disrupt upstream ecosystems

6. how are greenhous gases supected of causing climate warming?
A. Greenhouse gases absorb solar energy and re-emit it into space before it can reach the Earth's surface
B. Infrared energy from space is absorbed by greenhouse gases in the upper atmosphere, which then re-emit the heat towards the surface of the Earth, causing the climate to warm
C. Greenhouse gases block solar energy from entering the lower level of the atomsphere
D. Greenhouse gases prevent radiation of infared energy back into space, trapping the heat near the Earth's surface and causing the climate to warm
E. Solar energy is absorbed by green house gases in the upper atmosphere and re-emitted towards the Earth's surface as heat, causing the climate to warm

7. True or False: Since water is a renewable resource, fresh water is readily available globally.

Explanation / Answer

1) D. contour with no-till farming

2) E. evaporation of water used in irrigation causes salinizatin of the land, reducing the ability of plants to grow

3) B. providing water

4) D. It depletes fish that feed on some species and serve as food sources for other species, leading to the eradication of some species and the overpopulation of others

5) E. Water levels below dams are reduced, and large dams disrupt upstream ecosystems

6) B. Infrared energy from space is absorbed by greenhouse gases in the upper atmosphere, which then re-emit the heat towards the surface of the Earth, causing the climate to warm

7) False

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.