12.Practice.Tests.for.the.SAT_2015-2016_1128p

12 Practice Tests for the SAT
Practice Test Three Answers and Explanations I
309
The passage lists ways in which bacteria are useful in
industry and production; predict that a right answer will list
some specific use of bacteria in industry.
Choice (A) is an opposite; this is not relevant to a humancontrolled
industry. Choice (B) works; it's an intentional use
of bacteria in manufacturing. Choice (C) is an opposite;
this is a negative impact, not a useful function of bacteria.
Choice (D) is an opposite; this is a natural process, not an
industry. Choice (E) is an opposite; this is also a natural
process rather than an industry.
17. D
Difficulty: igh
For Roman numeral questions, eliminate answer choices
after evaluating each of the three options.
The passage says that bacteria improve the nutrient
absorption and therefore the yield of food crops (lines
60-6 1 ), but also that it can kill a farm 's entire crop (lines
74-75), so it can both help and harm agriculture. Eliminate
(B) and (C), since neither of them includes agriculture. The
passage says we use bacteria to culture cheese and give
each type its distinctive flavor (lines 54-56) but also that
another species of bacteria could vel}' well be working on
spoiling it (lines 70-7 1 ) , so cheese manufacture is another
industry bacteria can both help and harm. Eliminate (A)
because it doesn't include cheese manufacture. Finally,
the passage says, If canned food is not heated to 250°
Fahrenheit during preservation, it could be infected with
botulism (lines 75-77), but there is no example in the
passage of how canning could be helped by bacteria, so Ill
is not going to be in the answer. Eliminate (E); the answer
is (D).
18. D
Difficulty: Low
Use your notes to find the paragraph with the information
that is relevant to the question.
The dangers of bacteria are discussed in paragraph 5, which
states that the industry concerned with antibacterial cleaning
and sterilization is supported by the fact that bacteria is
dangerous. Predict something like "the antibacterial cleaning
industry."
Choices (A), (B), and (C) are all uses of beneficial bacteria.
Choice (D) matches your prediction. Choice (E) is an
opposite; this is a use of beneficial bacteria.
19. D
Difficulty: Medium
As you read, notice any key words that might indicate the
author's opinion.
The opening sentence mentions a category of life which
is fascinating, versatile, useful, and surprisingly varied
and populous. From this, you can predict that the author's
attitude toward her topic of bacteria is one of interest and
appreciation.
Choice (A) is extreme; though the author appreciates
bacteria, exhilaration is too strong a word. Choice (B) is
out of scope; there is no humor in the passage. Choice
(C) is out of scope; the author does not set out to criticize
anything. Choice (D) is close to your prediction. Choice (E)
is an opposite; if anything, the author seems to like bacteria.
SECTION 8
1. A
Difficulty: Low
Strategic Advice: If a < b and b < c, then a < c.
Getting to the Answer:
80 < 3b < 1 Oc, so 80 < 1 Oc
2. E
Difficulty: Low
Strategic Advice: The graph of a function crosses the x-axis
when the value of the function equals zero. Find the values
of t at which g (t) = 0 by solving the equation 2t - 6 = 0.
You could also use Backsolving, plugging each possible value
of t into the function to see which ones give a value of 0.
Getting to the Answer:
2t - 6 = 0
3. A
2t =6
t=3
Difficulty: Medium
Strategic Advice: Whenever you see a triangle question
about angles, remember that the sum of the interior angles
of a triangle is 180 degrees.