6. which property is demonstrated when paper towels absorb a water spill?

7. water has high specific heat. what does this mean?

8. summarize how water’s high specific heat contributes to the moderation of
temperature. how is this property important to life?

9. define evaporation. describe the effect of this property on living things.

Question

6. which property is demonstrated when paper towels absorb a water spill?

7. water has high specific heat. what does this mean?

8. summarize how water’s high specific heat contributes to the moderation of
temperature. how is this property important to life?

9. define evaporation. describe the effect of this property on living things.

Accepted Answer

### Question 6
# Brief Explanations:
The property demonstrated when paper towels absorb a water spill is capillary action, which is related to water's adhesion (attraction to other substances) and cohesion (attraction to itself) properties. Paper towels have porous structures, and water molecules are attracted to the paper (adhesion) and to each other (cohesion), allowing water to move up the tiny spaces in the paper towel against gravity.
# Answer:
The property demonstrated is capillary action (related to adhesion and cohesion of water). Water adheres to the paper towel fibers and cohere to other water molecules, allowing absorption through the porous structure.

### Question 7
# Brief Explanations:
Specific heat is the amount of heat energy required to raise the temperature of 1 gram of a substance by 1 degree Celsius. A high specific heat for water means that water can absorb or release a large amount of heat energy with only a small change in its own temperature. For example, it takes a relatively large amount of heat to warm up water, and a large amount of heat is released when water cools down.
# Answer:
High specific heat of water means it requires a large amount of heat energy to change its temperature (e.g., to raise 1 g of water by 1°C, a relatively large quantity of heat is needed).

### Question 8
# Brief Explanations:
- **Temperature Moderation**: Since water has a high specific heat, it can absorb a lot of heat during the day (e.g., in oceans, lakes) without a large temperature increase. At night, it releases that heat slowly, preventing rapid cooling. This stabilizes the temperature of the environment (like coastal areas having milder climates).
- **Importance to Life**: For organisms, water in cells and bodies can absorb heat from metabolic processes or external heat without overheating. It also helps regulate the temperature of habitats (e.g., aquatic ecosystems stay stable, supporting life). Organisms can release heat when needed, and the stable temperature of water bodies supports diverse life forms.
# Answer:
- **Temperature Moderation**: Water’s high specific heat lets it absorb/release much heat with little temperature change. For example, oceans absorb heat during the day (preventing rapid warming) and release it at night (preventing rapid cooling), stabilizing local climates.
- **Importance to Life**: In organisms, water buffers temperature changes from metabolism or the environment (e.g., cells don’t overheat). Aquatic habitats (like lakes, oceans) have stable temperatures, supporting diverse life. Organisms (e.g., humans sweating, plants transpiring) use water’s heat absorption during evaporation to cool down.

### Question 9
# Brief Explanations:
- **Definition of Evaporation**: Evaporation is the process by which liquid water changes into water vapor (gas) at the surface of the liquid, often due to heat energy (e.g., from the sun or body heat) causing water molecules to gain enough energy to escape into the air.
- **Effect on Living Things**: Evaporation of water (e.g., sweating in animals, transpiration in plants) has a cooling effect. When water evaporates, it absorbs heat from the organism or its surroundings, lowering the temperature. This helps organisms regulate body temperature (e.g., humans cool down when sweat evaporates; plants cool their leaves during transpiration). Also, evaporation drives the water cycle, which is essential for providing water to ecosystems and organisms.
# Answer:
- **Definition**: Evaporation is the process of liquid water turning into water vapor (gas) at the liquid’s surface, as molecules gain energy to escape.
- **Effect on Living Things**: Evaporation (e.g., sweating, transpiration) cools organisms: when water evaporates, it absorbs heat from the organism/surroundings, reducing temperature (e.g., humans cool via sweat evaporation; plants cool leaves). It also drives the water cycle, supplying water to ecosystems.

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