{"id":19026,"date":"2015-09-18T16:08:39","date_gmt":"2015-09-18T16:08:39","guid":{"rendered":"http:\/\/www.mometrix.com\/academy\/?page_id=19026"},"modified":"2026-07-21T09:24:10","modified_gmt":"2026-07-21T14:24:10","slug":"act-science-practice-test","status":"publish","type":"page","link":"https:\/\/www.mometrix.com\/academy\/act-science-practice-test\/","title":{"rendered":"ACT\u00ae<\/sup> Science Practice Test"},"content":{"rendered":"

The Science section of the ACT\u00ae<\/sup> evaluates your knowledge of various science concepts, including data analysis, graphs, experiments, and formulating predictions.<\/p>\n

\nACT\u00ae<\/sup> is a registered trademark belonging to ACT Education Corp. (\u201cACT\u201d). ACT is not involved with or affiliated with Mometrix Media LLC, nor does ACT endorse or sponsor any of the products or services offered by Mometrix Media LLC.
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\nTo help you prepare for this section of the ACT, this page contains everything you need to know, including what topics are covered, how many questions there are, and how you can study effectively.<\/p>\n

Click \u201cStart Test\u201d above to take a free ACT Science practice test!<\/p>\n

\nACT Online Course<\/a>
\nACT Study Guide<\/a>
\nACT Flashcards<\/a>\n<\/div>\n

<\/span>What’s on the ACT Science Section?<\/h2>\n

\"ACT<\/a><\/p>\n

<\/span>ACT Science Practice Questions<\/h2>\n

One of the best ways to test your knowledge is by taking a practice test. Evaluate your science knowledge by trying your hand at the three practice questions below!<\/p>\n

Answer each question and read through the answer explanation, whether you got the answer right or wrong. This will help you ensure you’ve got the topic mastered.<\/p>\n

Whether you struggled with these questions or aced them on your first try, be sure to take the full practice test<\/a> to get a better idea of how prepared you really are!<\/p>\n

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1. Read the passage below before answering the question:<\/p>\r\n

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\r\n \"Closed\r\n \"Open\r\n Read Passage<\/span>\r\n <\/div>\r\n
A scientist wishes to test the effectiveness of an antibiotic. To do this, she takes nine Petri dishes filled with agar, a nutrient substrate on which bacteria grow readily, and labels them with the numbers 1 through 9. She then introduces bacterial cultures into each Petri dish, taking care to spread them evenly along the surfaces.\r\n
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\r\nIn dishes 1 through 3, the scientist then places a drop of solution of the antibiotic to be tested at a concentration of 2 parts per thousand. (The rest of the solution is water.) She does the same to dishes 4 through 6 but with a solution at a concentration of one part per thousand. In dishes 7 through 9, the scientist places a drop of a control liquid. The scientist covers the Petri dishes, leaves them in a cool location for five days, and then examines the results. The diagrams below show the growth of bacteria in each dish after five days; the gray areas show where on the Petri dish bacterial cultures have grown, whereas the white areas show parts of the agar that are clear of bacteria.\r\n
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\r\n\"Nine\r\n\r\n <\/div>\r\n <\/div>\r\n\r\n

What is the best conclusion that can be drawn from the given data?<\/p>\r\n \r\n