Hydroponics One
1. The process whereby green plants use sunlight to convert carbon dioxide and water to suagr and oxygen is called:
A
photosynthesis
B
respiration
C
germination
2. The process of a seed growing into a seedling is:
A
respiration
B
germination
C
rooting
3. The most common diseases in hydroponics are caused by:
A
worms
B
fungi
C
bacteria
4. Examples of media used in hydroponics are:
A
sand and scoria
B
sandy or loam soil
C
clay or loam soil
5. N, P and K to a gardener mean:
A
nitrates, phosphates and care
B
no plant killing
C
nitrogen, phosphorus and potassium
6. Hydroponics is often called:
A
"soil-less" gardening
B
dirty and ineffective
C
old-fashioned and conventional
7. Some places wher hydroponics can be used include:
A
arid areas
B
Antarctica
C
both of the above
8. The most commonly commercially grown vegetables in hydroponics are :
A
brussels sprouts and carnations
B
lettuce and tomatoes
C
roses and radishes
9. Perlite is a:
A
type of loam soil
B
stable inert material
C
chemical used in nutrient solution
10. The function of the medium is:
A
to anchor the roots
B
to provide minerals
C
to change colour if too dry
11. The name for the complex mixture of nutrients used in hydroponics is the:
A
chemical concoction
B
nutrient solution
C
medium
12. "Hard" water contains a lot of:
A
nitrogen
B
phosphates and molybdenum
C
calcium and magnesium salts
13. If the nutrient solution has a pH of 6, it is slightly:
A
acidic
B
alkaline
C
basic
14. The optimum temperature in degrees Celsius for plant growth is:
A
30
B
15
C
22
15. Hydroponically grown require good drainage for:
A
absorption of nutrients by the medium
B
well ventilated healthy roots
C
better fungal growth
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