Which of the following is not used in hydroponics?

• Water

• Air

• Nutrients

• Soil

Hydroponics was invented in _____.

• Babylon

• America

• Taiwan

• Egypt

The word "ponos" means _____.

• ponies

• water

• labor

• sunlight

The Nutrient Film Technique keeps the plants separate from the water source.

• True

• False

What is used in aquaponics that is not used in hydroponics?

• Water

• Fish

• Nutrients

• Air

What do the fish do in aquaponics?

• Look nice

• Create nutrients

• Eat the plants

• Provide food for people

Both hydroponics and aquaponics use _____ less water than traditional farming.

• 1%

• 10%

• 50%

• 90%

Which of the following is a benefit of aquaponics?

• The plant yield is higher.

• Plants take longer to grow.

• It uses more water than normal farming.

• Plant quality is lower.

What do 3D food printers use to cook as they print?

• A flamethrower

• A heatlamp

• Lasers

• A lighter

Which of the following can be used to make 3D printed food?

• Insects

• Old food

• Algae

• All of them