CASE ASP Unit 2.2

What is the definition of an Acid?

• A substance which gives off hydroxyl ions when dissolved in water.

• A mineral used to treat sodic soils.

• A substance containing hydrogen that dissociates to form hydrogen ions when dissolved in water.

• A substance that increases the pH level above 7 when dissolved in water.

What does the term Alkaline refer to?

• A basic reaction where the pH reading is above 7.

• A chemical reaction that decreases pH levels.

• A substance with a pH less than 7.0.

• A substance used to resist changes in pH.

What is the purpose of a Buffer in agricultural science?

• To measure the electrical conductivity in hydroponics.

• To increase the nutrient content in soil.

• To resist change in pH.

• To add essential minerals to water.

What does Electrical Conductivity measure in hydroponics?

• The pH level of the solution.

• The amount of water available to a plant.

• The light intensity available for plant growth.

• The amount of nutrients in a solution available to a plant.

Tags

NGSS.MS-LS2-4

What is Gypsum primarily used for in agriculture?

• To increase the pH level of acidic soils.

• To measure soil conductivity.

• To decrease the pH level of alkaline soils.

• To treat sodic soils.

What does the term 'Organic' refer to in the context of this glossary?

• Compounds containing only carbon and hydrogen.

• A synthetic substance used in fertilizers.

• Produced by plants and animals; of plant or animal origin.

• A type of mineral used in agriculture.

What is the definition of Saline soil?

• Soil containing soluble salts in quantities that interfere with the growth of most crop plants.

• Soil that is beneficial for most crop plants.

• Soil with high levels of magnesium and calcium.

• Soil with a neutral pH level.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1