The Properties of Water
The Properties of Water
This activity contains 5 questions.
Water readily sticks to many other substances, a property called ______.
Water striders are common insects that can skip across the surface of ponds and streams. This lifestyle is enabled by water's _____.
cohesion and resulting surface tension
high specific heat
none of the above
Which best describes how charges are distributed on a water molecule?
The oxygen end is positive relative to the end with the two hydrogen atoms.
The oxygen end is negative relative to the end with the two hydrogen atoms.
The charge is neutral and equal throughout the molecule.
The oxygen end is neutral; one of the hydrogen atoms has a slight positive charge and the other hydrogen atom has a slight negative charge.
Relative to other substances, water tends to resist changes in temperature. Why?
Water is extremely dense, and like all dense materials, it can absorb a great deal of heat with a relatively small change in temperature.
Water is abundant. Large bodies of water resist changes in their temperature simply because they are massive objects.
Water is highly cohesive. Its molecules tend to resist increases in their motion. When water is heated, some of the energy is used to disturb the hydrogen bonds between neighboring molecules.
Water is highly adhesive. Pure water does not resist temperature change, but if water is bonded to other substances, molecules will tend to "stay put" and resist increases in their motion.
Water is sometimes called the "universal solvent." Is that accurate?
Certainly. Water's polar nature means that it can adhere to and dissolve all other substances.
Not at all. Only salts and carbohydrates can be dissolved in water.
For the most part. Water readily dissolves hydrophobic substances, but not hydrophilic ones.
For the most part. Water readily dissolves most substances, but not hydrophobic ones.
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