Read the following story and then answer the questions.
1a scientist wants to find out why sea water freezes at a lower temperature than fresh water. 2the scientist goes to the library and reads a number of articles about the physical properties of solutions. 3the scientist also reads about the composition of sea water. 4the scientist travels to a nearby beach and observes the conditions there. 5the scientist notes the taste of sea water and other factors such as waves, wind, air pressure, temperature, and humidity. 6after considering all this information, the scientist sits at a desk and writes, "if sea water has salt in it, it will freeze at a lower temperature than fresh water." 7the scientist goes the laboratory and does the following:
a. fills each of two beakers with 1 liter of fresh water
b. dissolves 35 grams of table salt in one of the beakers
c. places both beakers in a freezer at a temperature of l°c
d. leaves the beakers in a freezer for 24 hours.
8after 24 hours, the scientist examines both beakers and finds the fresh water to be frozen. 9the salt water is still a liquid. 10the scientist writes in a notebook, "it appears that salt water freezes at a lower temperature than fresh water." 11the scientist continues, "i suggest that the reason sea water freezes at a lower temperature is that sea water contains dissolved salts, while fresh water does not."
in which statement is the problem described?
question 7 options:
sentence 1
sentences 9
sentences 7
sentence 6