The ACT Science Test contains 40 multiple-choice questions to be answered in 35 minutes. The questions measure the interpretation, analysis, evaluation, and problem-solving skills associated with science. The science test is made up of several passages, each of which is followed by multiple-choice questions.
For gas atoms in a state of random motion, the mean free path, λ, is the average distance a gas atom will travel between collisions with other gas atoms. This distance depends upon the diameter of the gas atom, d, the volume of the gas, V, and the number of atoms of the gas, N.
A cathode-ray tube (CRT) is a sealed, evacuated glass tube with a filament at one end and a fluorescent screen at the other end (see Figure 1).
Two studies were done to examine how the proportion of vermicompost (feces from earthworms) in a particular potting soil affects the yield of each of 2 plant species: Solanum lycopersicum (a tomato plant) and Capsicum annuum (a pepper plant). The yield of a plant species is the mass of fruit produced per plant of the species.
Star formation begins with the gravitational collapse of matter in an interstellar gas cloud. A protostar (forming star) affects gas in the surrounding portions of the cloud in 2 ways:
A high concentration of dissolved nickel (Ni2+) in wastewater is an environmental concern. Students studied the removal of Ni2+ from wastewater, using an aqueous Ni2+ solution as a model of wastewater.
In a study of fur pigmentation in deer mice, Peromyscus polionotus, scientists compared the brightness of the fur of mice from populations located different distances directly inland from a coastal site. Figure 1 shows the 2 facial regions and the 2 body regions at which the fur of each mouse was evaluated (on a scale from 0 to 1.00) with respect to its brightness.
The science test is a 40-question, 35-minute test that measures the interpretation, analysis, evaluation, reasoning, and problem-solving skills required in the natural sciences. The test presents several authentic scientific scenarios, each followed by a number of multiple-choice test questions.
Measurements questions on the ACT Science Test involve the numbers and corresponding labels that appear in the graphs and tables of the Science passages. Questions that involve measurements sometimes allow you to approximate if the answer choices are far apart. Measurements questions are almost like Math questions with a Science theme.
For some ACT Science Test questions, you need to answer questions on how certain experiments are set up. These questions can appear in any of the three Science passages: Data Representation, Research Summaries, and Conflicting Viewpoints, but are much more common in Research Summaries. It is important to extract the set-up from any experiment mentioned before moving on to the questions.
In conflicting viewpoints passages, several different viewpoints or hypotheses are presented on a specific scientific phenomenon.
The first few paragraphs describe the phenomenon and the remaining paragraphs outline each student or scientist’s viewpoint. These passages typically contain more words than Research Summaries or Data Interpretation passages, so your reading skills will definitely be useful here.
The ACT Science Test is always the fourth test you will take. It has 7 passages and you get 35 minutes to complete them. That is about 5 minutes per passage so moving confidently through this test is essential. It takes practice to gain confidence in interpreting data and understanding the meaning of unfamiliar vocabulary.
Some ACT Science questions ask about the hypothesis each experiment is based on. Some will ask you to weaken and some will ask you to strengthen these hypotheses. For the weaken questions, you must fully understand the set-up behind the experiments in order to know whether the results will weaken a conclusion.
As you read each ACT Science passage, look closely for keywords that help you identify each scientist’s opinions. What does the author like? What does he dislike? What adjectives and adverbs does he use to describe the various scientific topics? He may feel positively about one thing, and negatively about another.
For Data Interpretation and Research Summaries questions on the ACT Science Test, you are often presented with a set of graphs and tables and required to answer relevant questions. It is important to take the time and thoroughly analyze the data before answering the questions.
Hypothesis questions occur on different parts of the ACT Science Test. You are going to see some ACT Science questions that ask about hypotheses on the Research Summaries passages, but hypothesis questions can also appear in Data Interpretation passages. You may be asked to compare hypotheses as well.
The Scientific Method is the process by which scientists attempt to construct an accurate representation of the world. This process is fundamental to scientific investigation and acquisition of new knowledge based upon actual physical evidence and careful observation. The Scientific Method is a means of building a supportable, documented understanding of our world.