ACT reading practice test 16

DIRECTIONS: Each passage is followed by several questions. After reading a passage, choose the best answer to each question and fill in the corresponding oval on your answer document. You may refer to the passages as often as necessary.

NATURAL SCIENCE: This passage is adapted from the entry "Migration" from Wallace Wimpole's Bird Book (? 1998 by Wallace Wimpole).

1. The main purpose of the passage is to:

A. discuss the research techniques of scientists studying bird migration.
B. provide data on the distances traveled seasonally by various migratory bird species.
C. describe various factors that stimulate migratory behavior in birds.
D. prove the effects of weather on bird migration.

2. The author uses the information in parentheses in lines 6-8 primarily to:

F. prevent readers from misunderstanding the statistic cited in the previous sentence.
G. debunk claims that the biological mechanism for migration is complex.
H. imply that ornithologists disagree about whether birds choose their migration schedule.
J. prove the assertion that the migration cycle is changing due to global warming.

3. The passage mentions which of the following as a limitation to Dolnik and Blyumental's research?

A. Their focus on only one species of diurnal migratory land birds with a relatively short migration path
B. Their selection of the Baltic Coast
C. Their destruction of healthy birds for research purposes
D. Their inaccurate counts of the total number of birds in each flock, because of the constant movement of individual birds

4. The main purpose of the third paragraph (lines 22-35) is to:

F. specify the many sources of food birds use as energy to fuel their migratory movements.
G. document the weather conditions that impact birds' ability to fly.
H. present a variety of reasons why the availability of nourishment is important in the timing of bird migration.
J. summarize several scientific principles discovered by observing migratory birds.

5. As presented in the passage, the statement in lines 44-45 is best described as:

A. an assumption based on a small sample of a few captured chaffinches.
B. a characterization based on the comparison of the fat content of the bodies of many individual chaffinches.
C. an observation based on the visual appearance of chaffinches as they flew over the Baltic Coast.
D. an opinion based on the personal preferences of Dolnik and Blyumental.

6. It can reasonably be inferred that researchers have measured the longest migration periods and distances for which of the following types of migratory birds?

F. Land birds
G. Sea birds
H. Tropical birds
J. Temperate birds

7. Based on the passage, scientists observe that compared to wild birds, caged birds may be:

A. less likely to use weather conditions to time their migrations.
B. more likely to amass stores of body fat.
C. unable to differentiate between day and night.
D. just as capable of sensing the changing of the seasons.

8. Suppose that a scientist were to replicate the exact conditions of Dolnik and Blyumental's experiments as described in the passage. At which of the following times would the scientist reasonably expect to find the greatest number of birds migrating?

F. On the first day of the migration wave in the morning
G. On the second day of the migration wave in the morning
H. On the second day of the migration wave in the afternoon
J. On the third day of the migration wave in the afternoon

9. Based on the passage, how should the statement that Dolnik and Blyumental "determined the social influence healthy birds have" (lines 42-43) most likely be understood?

A. Dolnik and Blyumental found a greater number of healthy than unhealthy chaffinches in flocks that migrated.
B. During waves of migration, lean chaffinches were found to emulate the feeding behavior of fat chaffinches.
C. Dolnik and Blyumental discovered that chaffinches became less healthy as the migration continued.
D. After fatter chaffinches flew, Dolnik and Blyumental observed greater and greater numbers of leaner chaffinches begin to migrate.

10. The author most nearly characterizes the migratory pattern made by wandering albatrosses as:

F. common for coastal birds.
G. typical of temperate migrants.
H. uncommon among migratory birds.
J. unusual for long-distance migrants such as sea birds.