Ch. 7 Soil Water Review

TRUE or FALSE: Most plants require very large amounts of water.

• TRUE

• FALSE

TRUE or FALSE: When soil becomes too dry for plants to access any water, it has reached the permanent wilting point.

• TRUE

• FALSE

TRUE or FALSE: A shortage of water in plant tissue is said to stress it.

• TRUE

• FALSE

Water is used in this process as a building block to manufacture carbohydrates.

• Photosynthesis

• Transpiration

• Evaporation

• Solvent

Evaporation of water helps to _______ the plant.

• Cool

• Heat

• Dry

• Moisten

TRUE or FALSE: Adhesion is the attraction of soil water to soil particles.

• TRUE

• FALSE

The attraction of water to soil particles and to itself is known as _______.

• Matric potential

• Gravitational potential

• Osmotic potential

• Soil-water potential

YES or NO: At field capacity, has excess water been drained away and soil pores occupied by air and water?

• YES

• NO

• Sometimes

• Never

Which type of soil water flows downward through the soil profile?

• Adhesion water

• Available water

• Capillary water

• Gravitational water

Which type of soil water is held so tightly to soil particles that it can only be removed by drying soil in an oven?

• Adhesion water

• Available water

• Capillary water

• Hygroscopic water