1.0 - Hydroponics (PRACTICE)

What is hydroponics?

• Growing plants in air

• Growing plants in water with added nutrients

• Growing plants in sand

• Growing plants in soil

What does soil provide to plants in nature?

• Only root support

• Water, nutrients, light, air, and root support

• Only water

• Only nutrients

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NGSS.MS-LS2-1

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Why can't hydroponic systems submerge roots in water all the time?

• Roots need oxygen to live

• Roots need constant sunlight

• Roots need to be in soil

• Roots need to be dry

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NGSS.MS-LS1-5

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What is rockwool?

• A type of soil

• A type of plant

• An inorganic, spongy, fibrous substance

• A type of nutrient

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NGSS.MS-PS1-3

Which of the following is NOT a popular hydroponic medium?

• Clean sand

• Gravel

• Perlite

• Clay

What is the main difference between passive and active hydroponic systems?

• Passive systems use energy, active systems do not

• Active systems use energy, passive systems do not

• Passive systems are for larger plants, active systems are for smaller plants

• Active systems are for smaller plants, passive systems are for larger plants

What is the nutrient film technique (NFT) in hydroponics?

• A method where plants are grown in soil

• A method where roots are submerged in water

• A method where plants are grown in sand

• A method where roots are suspended in a dark channel and nutrients are sprayed or trickled along the root zone

What is the best temperature range for water to make nutrients most available to plants in hydroponics?

• 75 to 85 degrees F

• 65 to 75 degrees F

• 85 to 95 degrees F

• 55 to 65 degrees F

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NGSS.MS-LS2-1

What should gardeners do if their tap water contains a lot of chlorine?

• Add more nutrients to the water

• Boil the water

• Use it directly

• Use distilled water or leave water uncovered for a couple of days

Tags

NGSS.MS-LS2-1

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Which of the following is a disadvantage of using perlite as a hydroponic medium?

• It holds too much water

• It is too heavy

• It does not provide good drainage

• Its fine dust can irritate lungs