Hydroponics

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  • 1/14 Questions

    Hydroponics gets its name from the two Greek words hydro, meaning water, and ponics, meaning labor.

    • False
    • True
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Hydroponics - Quiz
About This Quiz

From unit 11, Intro to Plant and Soil Science and Technology, by interstate publishing.

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  • 2. 

    A  water culture system which allows water to spray on the roots, which are suspended in air, is called:

    • Nutrient film technique

    • Water culture

    • Bob

    • Aerosmithian culture

    • Aeroponics

    Correct Answer
    A. Aeroponics
    Explanation
    Aeroponics is a water culture system where the roots of plants are suspended in air and water is sprayed onto them. This technique allows for efficient nutrient uptake and oxygenation of the roots, promoting healthy plant growth. It is a popular method for growing plants in a controlled environment, such as greenhouses or indoor gardens, as it maximizes space and conserves water.

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  • 3. 

    Regarding nutrient needs, hydroponics sytems can effectively and rapidly be adjusted by:

    • Removing old nutrient solution and replacing water with new solution.

    • Adding new nutrients to old solution.

    • Adding water to dilute nutrient solution.

    • Calling Ghostbusters. They'll fix it.

    Correct Answer
    A. Removing old nutrient solution and replacing water with new solution.
    Explanation
    Hydroponic systems require regular adjustment of nutrient levels to ensure optimal plant growth. One way to achieve this is by removing the old nutrient solution and replacing it with a fresh one. This allows for the replenishment of essential nutrients that may have been depleted and ensures that the plants have access to the necessary elements for their growth. Adding new nutrients to the old solution may not be effective as it does not address the issue of nutrient depletion. Similarly, diluting the nutrient solution with water may not provide sufficient nutrients for the plants. The last option, calling Ghostbusters, is a humorous and irrelevant choice.

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  • 4. 

    Light reaching the nutrient solution in hydroponics will likely cause __________ to form.

    • Snow crystals

    • Penicillin

    • Roots

    • Algae

    • crowds

    Correct Answer
    A. Algae
    Explanation
    In hydroponics, plants are grown without soil, and instead, they are nourished by a nutrient solution. When light reaches the nutrient solution, it provides energy for photosynthesis, which is the process by which plants convert light into chemical energy. Algae are photosynthetic organisms that can thrive in water, and they are known to grow rapidly in the presence of light and nutrients. Therefore, the correct answer is algae, as light reaching the nutrient solution in hydroponics is likely to cause algae to form.

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  • 5. 

    Soil can contain dormant weeds and insects.  Hydroponics will not reduce the risk for such pests.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Hydroponics is a method of growing plants without soil, using nutrient-rich water instead. Since hydroponics does not involve the use of soil, it eliminates the risk of dormant weeds present in the soil. Additionally, the controlled environment in hydroponics systems makes it easier to prevent and control insect infestations. Therefore, hydroponics does reduce the risk of pests compared to traditional soil-based gardening. Therefore, the given answer "False" is correct.

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  • 6. 

    Nutrients in hydroponics water are tested in:

    • Parts per hundred.

    • Parts per thousand.

    • Parts per million.

    • Parts per trillion.

    • Parts per gazillion.

    Correct Answer
    A. Parts per million.
    Explanation
    Nutrients in hydroponics water are typically measured in parts per million (ppm). This unit of measurement expresses the concentration of a substance in a solution, indicating the number of parts of that substance per one million parts of the solution. It is commonly used in hydroponics to ensure accurate and precise nutrient dosing for optimal plant growth.

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  • 7. 

    Hydroponics systems are not yet built on a large, multi-acre scale, producing year-round produce in climate challenged areas.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Hydroponics systems are actually built on a large, multi-acre scale and are capable of producing year-round produce in climate challenged areas. This technology allows for efficient and controlled cultivation of plants without soil, using nutrient-rich water solutions instead. Hydroponics systems have gained popularity in recent years due to their ability to maximize crop yields and minimize water usage, making them a viable solution for sustainable agriculture in various environments.

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  • 8. 

    Common commercial hydroponics crops include:

    • Oak trees, tomatoes, peppers, and cotton.

    • Tomatoes, peppers, cotton, and pumpkins.

    • Tomatoes, peppers, herbs, and cut flowers.

    • Tomatoes, peppers, lettuce, and spruce trees.

    • Corn, soybeans, alfalfa, and wheat.

    Correct Answer
    A. Tomatoes, peppers, herbs, and cut flowers.
    Explanation
    The correct answer is tomatoes, peppers, herbs, and cut flowers. This answer is supported by the fact that these crops are commonly grown in hydroponics systems for commercial purposes. Hydroponics is a method of growing plants without soil, using nutrient-rich water instead. Tomatoes and peppers are popular hydroponic crops due to their high demand and suitability for this cultivation method. Herbs and cut flowers are also commonly grown hydroponically for their market value and ability to thrive in a controlled environment.

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  • 9. 

    Which of the following are objections to raising plants hydroponically?

    • High initial cost.

    • Labor intensive.

    • Diseases can spread rapidly throughout a system.

    • All of the above choices are correct.

    • None of the choices are correct.

    Correct Answer
    A. All of the above choices are correct.
    Explanation
    All of the given choices are objections to raising plants hydroponically. Firstly, high initial cost is a valid objection as setting up a hydroponic system can be expensive due to the need for equipment such as grow lights, pumps, and nutrient solutions. Secondly, hydroponic systems can be labor-intensive as they require regular monitoring and maintenance, including adjusting nutrient levels and pH. Lastly, diseases can spread rapidly throughout a hydroponic system, posing a risk to the plants. Therefore, all of these objections are correct when considering raising plants hydroponically.

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  • 10. 

    Inert means that aggregate materials such as rockwool or perlite do not provide nutrients to the plant.

    • False

    • True

    Correct Answer
    A. True
    Explanation
    The explanation for the given correct answer is that inert materials like rockwool or perlite do not contain any nutrients that can be absorbed by plants. These materials are commonly used in hydroponic systems as a medium for plant roots to anchor themselves. However, since they do not have any nutritional value, plants grown in inert materials require regular feeding with nutrient solutions to ensure proper growth and development. Therefore, the statement that inert materials do not provide nutrients to the plant is true.

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  • 11. 

    Hydroponic tomotoes may look good but they may not taste so fresh, because:

    • They are picked too soon.

    • They are not picked soon enough.

    • The tomatoes are supposed to be green and sour, it makes them healthier for you.

    • The tomatoes are really potatoes in disguise, but the packager could not spell.

    • High school musical four hasn't even been filmed yet.

    Correct Answer
    A. They are picked too soon.
    Explanation
    Hydroponic tomatoes may not taste so fresh because they are picked too soon. Picking tomatoes too early prevents them from fully ripening and developing their natural flavors. This can result in a less flavorful and less enjoyable taste experience for consumers.

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  • 12. 

    Tomatoes and Peppers don't do too well in our greenhouse.  Which of the following reasons could contribute to their demise?

    • The air temperature seems to hover about 60 degrees.

    • The nutrient solutions are often inaccurate.

    • There are few insects that readily pollinate flying about in the greenhouse.

    • The tank runs dry on weekends.

    • All of the choices are potential challenges in our systems.

    Correct Answer
    A. All of the choices are potential challenges in our systems.
    Explanation
    All of the choices listed could contribute to the demise of tomatoes and peppers in the greenhouse. The air temperature of 60 degrees may not be ideal for their growth and development. Inaccurate nutrient solutions can lead to nutrient deficiencies or toxicities, affecting the health of the plants. The absence of insects for pollination can result in poor fruit set and reduced yield. Lastly, if the tank runs dry on weekends, it means that the plants may not receive water and necessary irrigation during that time, which can cause stress and damage to the plants.

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  • 13. 

    The ______________   ______   _________________ system is run on a timer.  It fills with water, then slowly drains after the water washes across the roots.  It then fills again and repeats the cycle.

    Correct Answer
    ebb and flow
    Explanation
    The ebb and flow system is run on a timer. It fills with water, then slowly drains after the water washes across the roots. It then fills again and repeats the cycle.

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  • 14. 

    The materials used in aggregate culture for plants to take root in are called______________ and they are basically inert.

    • Aggregates

    • Substrates

    • Rockwools

    • Inerts

    • Nutrient film technique

    Correct Answer
    A. Substrates
    Explanation
    Substrates are the materials used in aggregate culture for plants to take root in. They are basically inert, meaning they do not contain any nutrients. Substrates provide physical support to the plants and allow for proper root development. They also help in water retention and aeration, ensuring that the plants receive adequate moisture and oxygen. Some commonly used substrates include coco coir, perlite, vermiculite, and peat moss.

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Quiz Review Timeline (Updated): Mar 22, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 13, 2009
    Quiz Created by
    Dabartl1
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