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Test: ACT Science
A science class has been assigned a group project. Three different groups have been asked to plant a small pallet of grass and record growth over the course of 3 weeks. One blade of grass per trial was designated as the blade of grass to measure each week (the grass height for "Week 0" corresponds to the day the grass was planted). Every Monday (including the day it was planted) this same blade of grass is measured and its height (in inches) is recorded in a data table. The data collected by Group 1 corresponds to Table 1, Group 2 corresponds to Table 2, and Group 3 corresponds to Table 3.
Each group had two control conditions and one variable condition. The three conditions are:
- the amount of water given to the grass
- the type of soil the grass was planted in
- the amount of sunlight the grass is exposed to every day
The variables and data collected are as follows:
Group 1 variable: different amounts of water
Trial A - one cup of water is poured on the grass every Monday after measuring
Trial B - two cups of water are poured on the grass every Monday after measuring
Trial C - three cups of water are poured on the grass every Monday after measuring
Group 2 variable: different types of soil
Trial D - standard potting soil is used
Trial E - large rocks are mixed into the standard potting soil before the grass is planted
Trial F - small stones and pebbles are mixed into the standard potting soil before the grass is planted
Group 3 variable: different sunlight exposure
Trial G - the grass is given 3 hours of sun exposure per day
Trial H - the grass is given 6 hours of sun exposure per day
Trial J - the grass is given 9 hours of sun exposure per day
| 1. | Each group has a control condition for its three trials, and the control conditions are the same for each group. Given this information, determine which trial from each group serves as the control. |
Trial A, Trial E, Trial G
Trial B, Trial F, Trial H
Trial C, Trial E, Trial J
Trial A, Trial D, Trial H
Trial B, Trial F, Trial G
