What Do You Know About Environmental Science Quiz

2.

Salt buildup may

Increase crop growth
Increase yields
Eventually kill weeds
Eventually make the land unproductive
None of these answers

Correct Answer

A. Eventually make the land unproductive

Explanation

Salt buildup in the soil can have detrimental effects on crop growth and productivity. As salt accumulates in the soil, it increases the salinity levels, making it difficult for plants to absorb water and nutrients. This can lead to stunted growth, reduced yields, and eventually make the land unproductive for agriculture. The excess salt can also affect the germination of seeds and kill beneficial soil organisms. Therefore, the correct answer is that salt buildup eventually makes the land unproductive.

Rate this question:

3.

Which of the following can lead to desertification?

Conservation tillage
Severe and prolonged drought
Crop rotation
Polyculture farming
None of these answers

Correct Answer

A. Severe and prolonged drought

Explanation

Severe and prolonged drought can lead to desertification because it causes a significant decrease in rainfall and water availability, resulting in the drying out of soil and vegetation. Without enough water, plants cannot survive, leading to the degradation of land and the conversion of once fertile areas into deserts. This process is exacerbated by the lack of precipitation over an extended period, making it difficult for the ecosystem to recover and sustain life. Conservation tillage, crop rotation, and polyculture farming, on the other hand, are sustainable agricultural practices that aim to protect soil health and prevent desertification.

Rate this question:

4.

Which of the following best describes how the process of irrigation can lead to salinization of soils?

Water associated with irrigation flows uphill. The salts that were in the soil uphill end up being brought to the lower elevations.
Water associated with irrigation contains small amounts of dissolved salts. Evaporation leaves behind increasing concentrations of these salts.
Irrigation water is treated with dissolve salts to promote plant growth. Over time the plants become saturated with salts and do not need this macronutrient.
Irrigation is primarily accomplished through the use of abundant sea watre, which contains high concentrations of salts

Correct Answer

A. Water associated with irrigation contains small amounts of dissolved salts. Evaporation leaves behind increasing concentrations of these salts.

Explanation

The process of irrigation can lead to salinization of soils when water associated with irrigation contains small amounts of dissolved salts. When the water is applied to the soil, some of it is absorbed by the plants and some evaporates. As the water evaporates, it leaves behind the dissolved salts, which become more concentrated in the soil over time. This increase in salt concentration can be harmful to plants and can lead to soil salinization.

Rate this question:

5.

Strains of genetically motified food crops can hybridize with wild crop varieties when

The process is carefully controlled in an agricultural lab
Pollen blows from the genetically modified crop and spreads among wild varities
Pollen is transferred by the farmer from one crop to the other
It is not possible for a genetically modified plant to hybridize with a wild species
More than one of these answers is correct

Correct Answer

A. Pollen blows from the genetically modified crop and spreads among wild varities

Explanation

Genetically modified food crops can hybridize with wild crop varieties when pollen from the genetically modified crop is carried by wind and spreads among the wild varieties. This can happen naturally without any human intervention or control. Therefore, the correct answer is "Pollen blows from the genetically modified crop and spreads among wild varieties."

Rate this question:

6.

How many units of energy are required to produce one unit of grain-fed beef?

1
10
15
25
35

Correct Answer

A. 35

Explanation

The correct answer is 35 because producing one unit of grain-fed beef requires a significant amount of energy. The process involves growing and harvesting the grains to feed the cattle, transporting the grains, raising and caring for the cattle, and processing the meat. All of these steps require energy in the form of fuel, electricity, and resources. Additionally, the production of grain-fed beef has a higher environmental impact compared to other types of meat production, further contributing to the energy requirement.

Rate this question:

1

What Do You Know About Environmental Science Quiz

Most soil erosion is caused by

Quiz Preview

Salt buildup may

Which of the following can lead to desertification?

Which of the following best describes how the process of irrigation can lead to salinization of soils?

Strains of genetically motified food crops can hybridize with wild crop varieties when

How many units of energy are required to produce one unit of grain-fed beef?