Understanding Aquaponics and Sustainable Gardening

What is the primary nutrient source for plants in an aquaponics system?

• Chemical fertilizers

• Plant food

• Fish waste

• Compost

How do bacteria contribute to the aquaponics system?

• They produce oxygen

• They clean the water

• They break down fish waste

• They increase water acidity

What is the primary role of plants in an aquaponics system? Plants: ....

• Use chemical cleaners to clean up the water

• purify the system's water by adding nitrates and nitrites which help natural bacterial action

• purify the system's water by absorbing nitrates and nitrites from it

• absorb sunlight which keeps the system's water cool

Why are tilapia commonly used in aquaponics systems?

• They grow quickly

• They do not need water

• They are small fish

• They eat plants

What type of system is used in the narrator's greenhouse?

• Aquaponics only

• Hydroponics only

• Both aquaponics and hydroponics

• None of the above

How are substrates in this aquaponics system important to bacteria? They: ...

• provide a surface for colonies of bacteria to reproduce and grow

• cause bacteria to move around the system

• help to reduce the build up of bacteria which is actually good for the system

• transfer bacteria into plants which the plants need to produce food

How does the narrator's gardening system demonstrate concern for the environment?

• He uses solar energy to power his generator

• he uses a diesel generator to power most things on his farm

• plant scraps and fish waste are neatly bagged and placed outside for garbage collection

• he uses electricity from the grid to ensure the aquaponics system always has power

Why might solar power be a better option for an aquaponics gardening system like this?

• It may be cheaper than electricity

• It is more reliable during outages

• It is considered environmentally friendly

• All of the above

What is the primary challenge of gardening mentioned by the narrator?

• High costs

• Lack of space

• Lack of knowledge

• Pest control

What does the narrator consider as "the beauty to hydroponics"? This refers to the fact that one can: ...

• use water to assist in growing the hydroponics system because water is precious in desert areas

• use the earth to assist in growing the hydroponics system

• use wind which is widely available to assist in growing the hydroponics system

• use solar energy to assist in growing the hydroponics system