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:
A
medium
B
nutrient solution
C
seedling
10. Commonly used media in hydroponics are:
A
perlite and vermiculite
B
sand and soil
C
loam and clay
11. In flowing culture hydroponics, the nutrient solution:
A
drains into a bucket for disposal
B
flows back into the loam soil in which the plants grow
C
is constantly recycled using a pump
12. The pH preferred by most vegetables is slightly:
A
basic
B
acidic
C
alkaline
13. Disadvantages of hydroponics include:
A
high technical knowledge
B
expense to set up
C
both of the above
14. The best temperatures in degrees Celsius for plant growth are:
A
more than 30
B
between 15 and 30
C
less than 15
15. To reduce disease, it is important to:
A
remove dead leaves
B
change and replace the nutrient solution daily
C
change and replace the media daily
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