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Water, Ch 6
Test Description: Properties of water, c 6, 1 of 3
Instructions: Answer all questions to get your test result.
1) If ice did not float, Earth would have a different climate
A
True
B
False
2) Modern methods of measuring salinity of sea water depends on the rule of constant proportions because only chlorinity is measured
A
False
B
True
3) Proportions of organic elements are found in constant proportion just like sea salts are found in constant proportions
A
False
B
True
4) Changes in salinity can cause osmotic pressure between cells and the environment
A
False
B
True
5) What is a polar molecule
A
a molecular combiination found only in freezing conditions
B
a m olecule with a configuration that causes it to have a positively charged end and a negatively charged end
6) Properties of water that are possible because water is a polar molecule include
A
the ability to evaporate and reduce resistance to flow
B
being liquid at room temperature, surface tension, ice that floats
7) What is a solultion
A
a combinatiiion of 2 or more substances that intermingle but retain their individual properties
B
a combinatiiion of 2 or more substances in which the molecules of one substance are evenly dispersed among the molecules of t
8) What is salinity
A
all the inorganic dissolved solids in sea water
B
the sodium chloride portion of the non organice solids in sea water
9) Colligative properties of sea water
A
characteristics caused by dissolved solids in sea water
B
characteristics that both fresh and sea water have in common
10) What is the principle of constant proportions
A
salinity is constantly proportional to temperature
B
regardless of salinity, the proportion of the inorganic dissolved solids remainns the same relative to eachother
*select an answer for all questions
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