Science Warm-Up - Featuring ACT Question - Data Representation and Key Takeaways

Oct 9, 2026

Science Warm-Up presents a real ACT-style question in which students run up to an empty merry-go-round and jump onto its edge, then compare how the system’s spin changes. Trials vary the student’s mass, running speed, and the initial spin rate (rpm), with results recorded as final spin rate values in a table. The passage emphasizes quickly identifying independent versus dependent variables, isolating the requested trial, and reading step-by-step trends to decide whether the final spin rate increases, decreases, or remains steady.

LanguageEnglish

CategoryExam

FormatPPTX

Pages8

Reading Time20 min

AccessFree to download

Data Representation

Figure 1 and Table 1 Experiment Setup

Key Takeaways

Science Warm-Up [Class Name] [Teacher name] Featuring a real ACT question! Data Representation Students conducted an experiment to see how jumping on a merry-go-round affects how fast it spins. In each case an empty spinning merry-go-round was approached by a student who ran in the direction shown in Figure 1 and then jumped on the edge. Several trials, each consisting of three runs, were performed using students of different masses running at different speeds, and different initial spin rates for the merry-go-round, given in revolutions per minute (rpm). The results are shown in Table 1. Figure 1 adapted from Richard Wolfson and Jay M. Pasachoff, Physics: Extended with Modern Physics. ©1989 by Scott, Foresman/Little, Brown Higher Education. Figure 1 Table 1 Trial Mass of student (kg) Speed of student (m/sec) Initial spin rate (rpm) Final spin rate (rpm) 1 30 1.00 10 9.54 30 1.36 10 10.00 30 2.00 10 10.82 2 20 1.00 10 9.67 30 1.00 10 9.54 40 1.00 10 9.42 Science Warm-Up: Passage Figure 1 adapted from Richard Wolfson and Jay M. Pasachoff, Physics: Extended with Modern Physics. ©1989 by Scott, Foresman/Little, Brown Higher Education. Figure 1 Students conducted an experiment to see how jumping on a merry-go-round affects how fast it spins. In each case an empty spinning merry-go-round was approached by a student who ran in the direction shown in Figure 1 and then jumped on the edge. Several trials, each consisting of three runs, were performed using students of different masses running at different speeds, and different initial spin rates for the merry-go-round, given in revolutions per minute (rpm). The results are shown in Table 1. Science Warm-Up: Passage Table 1 Trial Mass of student (kg) Speed of student (m/sec) Initial spin rate (rpm) Final spin rate (rpm) 1 30 1.00 10 9.54 30 1.36 10 10.00 30 2.00 10 10.82 2 20 1.00 10 9.67 30 1.00 10 9.54 40 1.00 10 9.42 3 20 1.36 10 10.00 30 1.36 10 10.00 40 1.36 10 10.00 4 20 3.00 10 11.50 30 3.00 10 12.10 40 3.00 10 12.70 Science Warm-Up: Passage Table 1 Trial Mass of student (kg) Speed of student (m/sec) Initial spin rate (rpm) Final spin rate (rpm) 5 30 0.50 5 4.77 30 0.68 5 5.00 30 1.00 5 5.41 6 20 0.50 5 4.84 30 0.50 5 4.77 40 0.50 5 4.70 7 20 0.68 5 5.00 30 0.68 5 5.00 40 0.68 5 5.00 8 20 3.00 5 7.10 30 3.00 5 7.97 40 3.00 5 8.74 IV: DV: mass of student (kg),speed of student (m/sec),initial spin rate (rpm) final spin rate (rpm) Science Warm-Up: Passage decreased only. increased only. increased, then decreased. remained the same. F. G. H. J. In Trial 5, as the students’ speed increased, the final spin rate: Table 1 Trial - Speed of student (m/sec) - Final spin rate (rpm) 5 - 0.50 - 4.77 - 0.68 - 5.00 - 1.00 - 5.41 6 - 0.50 - 4.84 - 0.50 - 4.77 - 0.50 - 4.70 7 - 0.68 - 5.00 - 0.68 - 5.00 - 0.68 - 5.00 8 - 3.00 - 7.10 - 3.00 - 7.97 - 3.00 - 8.74 Science Warm-Up: Question 7 Science Warm-Up Key Takeaways Identify Variables Quickly: Distinguish independent variables (like speed and mass) from dependent variables (like final spin rate). Isolate Relevant Trials: Focus only on the requested trial (e.g., Trial 5) to analyze specific trends without getting distracted. Track Step-by-Step Trends: Observe if values increase or decrease sequentially to determine direct relationships. For more real ACT practice, visit act.org

FAQs

What experiment do the students conduct in Science Warm-Up?

Students approach an empty spinning merry-go-round, run in the shown direction, and jump on the edge. They then record how the final spin rate changes under different conditions.

Which variables are treated as independent and dependent in the passage?

Independent variables include the student’s mass and running speed, along with the merry-go-round’s initial spin rate. The dependent variable is the final spin rate (rpm).

How should a student analyze Trial 5 in the question?

Focus on Trial 5 only, track how the final spin rate changes as speed varies, and determine whether it increases, decreases, or follows a mixed trend across the listed values.

Oct 9, 2026

Uploaded by Maya Linwood