An informative diagram explaining the key properties of water, such as cohesion, adhesion, and surface tension, with visual examples and definitions.

It looks like you've uploaded a worksheet titled "WATER'S UNIQUE AND USEFUL PROPERTIES" that includes several fill-in-the-blank sections related to the physical and chemical properties of water. Since I can't view images directly, I'll help you solve the worksheet based on typical content found in such educational materials.

Below is a completed version of the worksheet with explanations for each section. If your image has slightly different wording or layout, feel free to provide more details, but this should cover most standard versions of this type of activity.

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🔹 Water’s Unique and Useful Properties

#### 1. Polar Molecule
- Universal Solvent: Water is called the "universal solvent" because it dissolves more substances than any other liquid.
- Why? Because water molecules are polar, meaning they have a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom.
- This polarity allows water to surround and dissolve ions and polar molecules (like salt and sugar).

✔ Fill-in:
> Water molecules are attracted to other molecules because of their partial charges. The hydrogen end is positively charged, and the oxygen end is negatively charged.

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#### 2. Cohesion
- Cohesion is the attraction between like molecules (e.g., water molecules sticking to each other).
- Water molecules are attracted to each other due to hydrogen bonds.

✔ Fill-in:
> Water molecules are attracted to each other because of hydrogen bonding. This makes water very cohesive.

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#### 3. Surface Tension
- Surface tension is the ability of water to resist external forces due to cohesion.
- It's caused by the strong hydrogen bonds at the surface of water, which create a "skin."

✔ Fill-in:
> The top layer of water has more cohesive forces than the rest of the liquid. This gives water high surface tension, which allows insects to walk on water.

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#### 4. Adhesion
- Adhesion is the attraction between different types of molecules.
- Water adheres to surfaces like glass or plant roots.

✔ Fill-in:
> Water molecules stick to other substances due to adhesion. This helps water move up through plant stems via capillary action.

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#### 5. Water’s Occurrence & States
- Water exists in three states: solid (ice), liquid (water), and gas (water vapor).
- At 0°C, water freezes; at 100°C, it boils.

✔ Fill-in:
> Water becomes solid when it freezes. This causes expansion, which is unusual — most substances contract when frozen.
> Water expands when it freezes, so ice floats on liquid water. This is important for aquatic life.

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#### 6. Heat Capacity
- Water has a high specific heat capacity, meaning it absorbs and releases large amounts of heat without changing temperature much.

✔ Fill-in:
> It takes a lot of energy to change the temperature of water. This means water helps regulate climate and keeps organisms from overheating or freezing too quickly.

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#### 7. Density
- Water is densest at 4°C.
- As it cools below 4°C, it becomes less dense and floats as ice.

✔ Fill-in:
> Water reaches its maximum density at 4°C. When it freezes, it becomes less dense and floats. This insulates lakes and rivers in winter.

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✔ Summary of Key Concepts:

| Property | Explanation |
|--------|-------------|
| Polarity | Water molecules are bent with partial charges → enables dissolution and hydrogen bonding. |
| Cohesion | Water molecules stick to each other → high surface tension. |
| Adhesion | Water sticks to other surfaces → capillary action in plants. |
| High Heat Capacity | Water resists temperature changes → stabilizes environments. |
| Density Anomaly | Ice floats because it's less dense than liquid water → protects aquatic ecosystems. |
| Universal Solvent | Dissolves many substances → essential for biological processes. |

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📌 Final Answer:

The worksheet likely requires filling in terms like:
- polar
- hydrogen bonds
- cohesion
- surface tension
- adhesion
- freezes
- expands
- high specific heat capacity
- density
- 4°C
- floats
- universal solvent

Let me know if you'd like a printable version or help with specific blanks!