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Hydroponics Two
1. Photosynthesis produces sugar and:
A water
B oxygen
C carbon dioxide
2. The most important thing needed for a seed to germinate is:
A nitrogen
B phosphate fertilizer
C water
3. To reduce contamination of hydroponics plants, you should:
A drain the nutrient solution out every day
B change the medium every week
C not use tools from the outdoor garden
4. A commonly used hydroponics medium is:
A perlite
B soil
C nutrient solution
5. The chemical symbol for nitrogen is:
A Ni
B Ng
C N
6. Soil-less plant growing is called:
A horticulture
B hydroponics
C aquaculture
7. People who grow plants hydroponically include:
A handicapped people
B unit or apartment dwellers
C both of the above
8. The most commonly commercial flower crop in hydroponics is the:
A carnation
B rose
C daisy
9. The general name for the stable inert material replacing soil in hydroponics is the:
Amedium
Bnutrient solution
Cseedling
10. Commonly used media in hydroponics are:
Aperlite and vermiculite
Bsand and soil
Cloam and clay
11. In flowing culture hydroponics, the nutrient solution:
Adrains into a bucket for disposal
Bflows back into the loam soil in which the plants grow
Cis constantly recycled using a pump
12. The pH preferred by most vegetables is slightly:
Abasic
Bacidic
Calkaline
13. Disadvantages of hydroponics include:
Ahigh technical knowledge
Bexpense to set up
Cboth of the above
14. The best temperatures in degrees Celsius for plant growth are:
Amore than 30
Bbetween 15 and 30
Cless than 15
15. To reduce disease, it is important to:
Aremove dead leaves
Bchange and replace the nutrient solution daily
Cchange and replace the media daily

 

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