Question

Up the Stem
Complete the sentences below to explain how water defies gravity in the stem.
Word bank: adhesion, xylem, cohesion, narrow
1. Water moves upward through specialized tubes called
2. Water molecules stick to the walls of the tube due to _____
- which helps them climb.
3. Water molecules also stick to each other due to _ up.
_ acting like a chain being pulled
4. Capillary action works best when the tubes are very ----

Answer 1

1. Water moves upward through specialized tubes called xylem.
2. Water molecules stick to the walls of the tube due to adhesion — which helps them climb.
3. Water molecules also stick to each other due to cohesion, acting like a chain being pulled up.
4. Capillary action works best when the tubes are very narrow.