Understanding Cohesion-Tension Theory

What process allows water to evaporate from plant leaves?

• Osmosis

• Photosynthesis

• Transpiration

• Condensation

What is the negative pressure created in leaf veins called?

• Pressure

• Tension

• Vacuum

• Suction

How does osmosis contribute to water movement in plants?

• Osmosis prevents water loss in leaves.

• Osmosis is the process of photosynthesis in plants.

• Osmosis only occurs in the stems of plants.

• Osmosis facilitates water uptake in roots, creating pressure that moves water through the plant.

Tags

NGSS.MS-LS2-1

What type of pressure is created in the roots of plants?

• Atmospheric pressure

• Soil pressure

• Root pressure

• Water pressure

Why do water molecules pull on one another in plants?

• Water molecules repel each other due to negative charges.

• Water molecules pull on one another because of gravity.

• Water molecules are attracted to soil particles instead of each other.

• Water molecules pull on one another due to cohesion from hydrogen bonding.

What role do stomata play in the cohesion-tension theory?

• Stomata absorb carbon dioxide for photosynthesis.

• Stomata facilitate transpiration, creating negative pressure that drives water movement in plants.

• Stomata store water to prevent evaporation.

• Stomata regulate nutrient uptake in roots.

How does surface tension affect water movement in plants?

• Surface tension only affects the leaves, not the roots.

• Surface tension has no effect on water movement in plants.

• Surface tension helps water move through plants by enabling cohesion and facilitating transpiration.

• Surface tension prevents water from moving in plants.

Tags

NGSS.MS-ESS2-4

What is the relationship between hypotonic soil solutions and plant root cells?

• Hypotonic soil solutions cause water to enter plant root cells, promoting turgor pressure.

• Hypotonic soil solutions make plant root cells dry out and wilt.

• Hypotonic soil solutions cause water to leave plant root cells, reducing turgor pressure.

• Hypotonic soil solutions have no effect on plant root cells.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What type of bonds do water molecules form that contribute to cohesion?

• Hydrogen bonds

• Van der Waals forces

• Covalent bonds

• Ionic bonds

How does the cohesion-tension theory explain water circulation in plants?

• Transpiration causes water to be pushed down from leaves to roots.

• The cohesion-tension theory describes how water is pulled up from roots to leaves through cohesion and tension created by transpiration.

• Water is absorbed by leaves and transported to roots.

• Cohesion-tension theory only applies to aquatic plants.