| 1. [d] Data (often in a table of results) |
|---|
| +1 | Line of latitude (or longitude) recorded |
| +1 | Starting longitude (or longitude) recorded |
| +1 | Ending longitude (or longitude) recorded |
| +1 | GPS distance data recorded, one point per GPS unit |
| +1 | Surveyors wheel data |
| +1 | Google Earth ruler data |
| 2. [t] Data tables format |
|---|
| 3 | Clear, concise, well thought out, informative, labels and units in the heads |
| 2 | Missing borders or other minor format inconsistencies, or missing one element in the head such as units |
| 1 | Incomplete, runs off edges of page, lacks minimal margins, or missing two or more elements such as borders and units |
| 3. [a] Data analysis [6] |
|---|
| +1 | Calculated difference in minutes of longitude along the line of latitude |
| +1 | Calculated mean distance in meters |
| +1 | Calculated meters per minute of longitude [or latitude] (m/min) |
| +1 | Experimentally determined Earth circumference (km) |
| +1 | Actual Earth circumference (km) |
| +1 | Percentage error from actual circumference of the Earth. |