| Acton Boxborough - GRADE 08 SCIENCE AND TECH/ENG |
| ITEM INFORMATION | | PERCENT OF DISTRICT'S POSSIBLE POINTS |
| ITEM | TYPE | REPORTING CATEGORY | STANDARD | ITEM DESC | | POSSIBLE POINTS | ACTON-BOXBOROUGH | STATE | DISTRICT-STATE DIFFERENCE |
| 1 | SR | TE | 6.ETS.2.1 | Describe why a material is an appropriate choice for part of a bridge. | | 1 | 88% | 81% | 7 |
| 2 | SR | PS | 8.PS.1.4 | Describe a change to a particle model that will show the atoms with more thermal energy. | | 1 | 91% | 70% | 21 |
| 3 | SR | PS | 6.PS.4.1 | Relate the amount of energy in a seismic wave to the wave's amplitude. | | 1 | 45% | 39% | 6 |
| 4 | CR | TE | 7.ETS.3.4 | Analyze a model bridge to determine the loads on the system and describe an advantage and a disadvantage of making a design change. | | 3 | 58% | 52% | 6 |
| 5 | CR | ES | 8.ESS.2.1 | Interpret a model of two oceanic plates colliding, identify a geological feature that is formed, and describe the process that causes plates to move. | | 3 | 45% | 33% | 12 |
| 6 | SR | LS | 8.LS.3.4 | Complete a table showing the percentages of genotypes for a cross between two plants that are heterozygous for a particular trait. | | 1 | 58% | 42% | 16 |
| 7 | SR | TE | 7.ETS.1.2 | Evaluate two design solutions to determine an advantage of one solution over the other. | | 1 | 65% | 52% | 13 |
| 8 | SR | TE | 8.ETS.2.5 | Describe the separation process for creating the desired shape of an object and describe the finishing process for that object. | | 2 | 55% | 39% | 16 |
| 9 | SR | PS | 7.PS.3.4 | Analyze particle models of two gas samples and determine that the samples differ in temperature. | | 1 | 92% | 70% | 22 |
| 10 | SR | PS | 6.PS.1.7 | Order a set of objects from least to most dense given the mass and volume of the objects. | | 1 | 66% | 35% | 31 |
| 11 | SR | ES | 8.ESS.1.1 | Interpret a model of the Sun-Earth system to explain the cause of the cyclical pattern of the seasons. | | 1 | 84% | 65% | 19 |
| 12 | SR | PS | 8.PS.2.2 | Analyze force models to determine whether the speeds of objects are changing. | | 1 | 78% | 46% | 32 |
| 13 | SR | LS | 7.LS.2.4 | Describe how a change in the amount of Arctic ice in polar regions is most likely to affect a species that lives in these regions. | | 1 | 84% | 70% | 14 |
| 14 | SR | ES | 7.ESS.2.4 | Interpret a model to determine how energy from the Sun and Earth's gravity affect the cycling of water. | | 1 | 87% | 77% | 10 |
| 15 | SR | PS | 7.PS.3.2 | Determine which object has the largest potential energy based on the mass and relative position of the objects. | | 1 | 73% | 44% | 29 |
| 16 | CR | LS | 8.LS.4.5 | Describe one advantage and one disadvantage of selecting traits artificially in a species. | | 2 | 51% | 38% | 13 |
| 17 | SR | LS | 7.LS.2.2 | Identify a factor that can limit competition between different species living in the same area. | | 1 | 94% | 84% | 10 |
| 18 | SR | LS | 6.LS.1.2 | Use a model to determine the part of a plant cell that produces sugars. | | 1 | 71% | 52% | 19 |
| 19 | SR | PS | 7.PS.3.6 | Identify an example of heat being transferred by conduction. | | 1 | 76% | 54% | 22 |
| 20 | SR | ES | 8.ESS.2.5 | Determine why air on Earth circulates between the equator and the poles. | | 1 | 68% | 50% | 18 |
| 21 | SR | ES | 6.ESS.1.5 | Determine the size of the Sun relative to the planets in our solar system. | | 1 | 92% | 84% | 8 |
| 22 | SR | TE | 6.ETS.2.3 | Select the appropriate safety equipment and tools needed to construct a prototype. | | 1 | 75% | 68% | 7 |
| 23 | SR | PS | 7.PS.2.3 | Compare the strengths of the electric forces between pairs of charges. | | 1 | 86% | 75% | 11 |
| 24 | SR | LS | 6.LS.1.3 | Determine the body system that directly controls when muscles contract. | | 1 | 62% | 54% | 8 |
| 25 | SR | TE | 7.ETS.3.3 | Determine whether parts of a vehicle are structural, propulsion, or control subsystems. | | 1 | 76% | 66% | 10 |
| 26 | SR | PS | 6.PS.1.8 | Determine the next step in a procedure for separating a mixture, and identify evidence that shows a substance is a mixture. | | 2 | 83% | 62% | 21 |
| 27 | CR | ES | 8.ESS.1.2 | Complete a model to show the force that keeps a planet in orbit around a star, and identify that force. | | 2 | 78% | 69% | 9 |
| 28 | SR | TE | 7.ETS.3.5 | Classify part of a transportation system according to the universal systems model. | | 1 | 59% | 49% | 10 |
| 29 | SR | ES | 6.ESS.1.4 | Analyze a diagram to determine the youngest rock layer that was present when a fault formed. | | 1 | 58% | 32% | 26 |
| 30 | SR | ES | 8.ESS.3.5 | Analyze a graph to determine a result of changes in atmospheric carbon dioxide levels over time. | | 1 | 64% | 54% | 10 |
| 31 | SR | LS | 8.LS.1.5 | Determine that genetic differences in individuals of the same species result in different traits. | | 1 | 84% | 72% | 12 |
| 32 | SR | LS | 7.LS.2.2 | Determine the relationship between a plant and an insect and describe that relationship. | | 1 | 92% | 84% | 8 |
| 33 | SR | LS | 7.LS.1.4 | Describe how attracting insects can increase the probability of a plant reproducing. | | 1 | 85% | 69% | 16 |
| 34 | SR | LS | 8.LS.3.2 | Select an advantage of a plant reproducing sexually and an advantage of a plant reproducing asexually. | | 1 | 79% | 67% | 12 |
| 35 | CR | LS | 6.LS.4.1 | Analyze fossil record data to describe fossils found in different time periods, and describe evidence that could show a relationship between certain plants and insects. | | 3 | 46% | 27% | 19 |
| 36 | SR | ES | 7.ESS.2.2 | Determine that an area in New England was once covered by glaciers based on a description of the area. | | 1 | 64% | 43% | 21 |
| 37 | CR | PS | 6.PS.1.6 | Analyze the results of an investigation to determine whether a reaction was endothermic or exothermic, and show how the results should be organized in a lab notebook. | | 3 | 55% | 43% | 12 |
| 38 | SR | ES | 6.ESS.1.1 | Determine the cause of the Moon's phases, and identify what occurs during one cycle of the Moon's phases. | | 2 | 70% | 59% | 11 |
| 39 | SR | TE | 6.ETS.2.1 | Identify an important property of a material for a given design task. | | 1 | 70% | 59% | 11 |
| 40 | SR | TE | 6.ETS.1.5 | Use an appropriate ruler to determine the scale of a drawing. | | 1 | 83% | 65% | 18 |
| 41 | SR | TE | 7.ETS.3.1 | Determine why part of a communication system is considered a decoder. | | 1 | 58% | 46% | 12 |
