ACT reading practice test 4

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 article "Fair-Weather Warning" by Julia Mittlebury (© 2007 by Julia Mittlebury).

1. According to Calwell, scientists may be able to predict cholera outbreaks more than a month in advance by:

A. noticing increased activity in a known food chain.
B. using accurate climatic models derived from weather in Bangladesh.
C. measuring the decline of zooplankton with falling sea temperatures.
D. finding connections between chlorophyll levels and diseased marine life.

2. According to the passage, levels of sunlight can influence cholera because:

F. phytoplankton feed on sunlight and contaminate the water.
G. the V. cholerae bacterium increases its photosynthetic rate.
H. sunlight promotes the growth of organisms upon which copepods depend.
J. many epidemics are caused by direct, prolonged exposure to sunlight.

3. According to the passage, the use of satellite data has aided the attempts of Oxford University researchers to predict outbreaks of sleeping sickness by providing information about:

A. the number of West African parasites.
B. which areas globally have the most photosynthesis.
C. the health and number of tsetse flies.
D. which flies have the biggest veins.

4. The passage states that Linthicum is conducting similar efforts to Calwell's in that Linthicum:

F. studies the climatic triggers of cholera.
G. works at the University of Maryland.
H. managed to save thousands of lives in 2007.
J. uses satellite data to build predictive models.

5. According to the passage, the use of satellite data to predict potential epidemics is encouraging because:

A. computer number-crunching is quicker and less expensive than traditional research methods.
B. it allows scientists to control the photosynthetic levels in West Africa.
C. satellites do not make the same mathematical errors that human forecasters often do.
D. there is already a large supply of long-term disease data available from satellites.

6. As it is used in line 44, the word favor most nearly means:

F. errand.
G. task.
H. promote.
J. request.

7. It can reasonably be inferred that the phrase similar environmental changes (line 48) refers to:

A. the beginning of the rainy season in Kenya.
B. the amount of bacteria circulating in the jet stream.
C. the proliferation of mosquitoes throughout central Africa.
D. warmer ocean water influencing rain and cloud cover.

8. The passage states that climatic satellite data has helped to do all of the following EXCEPT:

F. measure sea height.
G. predict tsetse fly populations.
H. forecast disease outbreaks.
J. raise the ocean temperature.

9. The phrase confuse climate-based models (line 85-86) refers directly to the fact that:

A. current models do not account for non-climate related factors.
B. drug resistance sometimes results in disorientation.
C. epidemics sometimes vanish more quickly than they arise.
D. researchers are not used to non-climate data.

10. It can reasonably be inferred from the passage that the information about the use of satellite-based data is presented primarily to:

F. demonstrate the various kinds of data that must be collected.
G. analyze the data's potential use in disease-prevention.
H. illustrate how few scientists do on-the-ground research.
J. show how West African tsetse fly populations have been predicted.