Question

properties of water: use (adhesion, cohesion, polarity, heat capacity) can be used more than once.

1. attraction between molecules of the same substance → ______
2. attraction between molecules of different substances → ______
3. energy needed to raise temperature → ______
4. produces surface tension → ______
5. capillary action in plants → ______
6. water has partial positive and negative ends → ______
7. in a water molecule, oxygen has ______ charge.
8. in a water molecule, hydrogen has ______ charge.

Explanation:

• 21: Cohesion is the attraction between molecules of the same substance.
• 22: Adhesion is the attraction between molecules of different substances.
• 23: Heat capacity is the energy needed to raise temperature.
• 24: Cohesion produces surface tension.
• 25: Capillary action in plants is due to both adhesion and cohesion.
• 26: Polarity means water has partial positive and negative ends.
• 27: In a water molecule, oxygen has a negative charge (because it is more electronegative and pulls electrons closer to itself).
• 28: In a water molecule, hydrogen has a positive charge (as electrons are pulled away from it towards oxygen).

Answer:

1. Cohesion
2. Adhesion
3. Heat capacity
4. Cohesion
5. Adhesion and Cohesion
6. Polarity
7. negative
8. positive