| Learn | Combo with Engine, motor, or both? and 2 others | September 24, 2010 |
| Test | Why is it renewable or nonrenewable? | March 10, 2010 |
| Test | Energy Sources vocab | March 10, 2010 |
| Test | Renewable or Nonrenewable? | March 10, 2010 |
| Test | Vehicle Types | March 10, 2010 |
| Test | Alternative Vehicle Acronyms | March 10, 2010 |
| Test | Fuel Storage (for powering vehicles) | March 10, 2010 |
| Test | Engine, motor, or both? | March 10, 2010 |
| Test | Basic Energy and Power Terms | March 10, 2010 |
| Test | Energy Forms and Conversions | March 10, 2010 |
| Test | Metric Conversions | March 10, 2010 |
| Test | Which unit is larger? | March 10, 2010 |
| Test | Engines and Strokes | March 10, 2010 |
| Test | Fuels | March 10, 2010 |
| Test | Future Cars: special features | March 10, 2010 |
| Test | Engine Parts | March 10, 2010 |
| Test | History of Engines | March 10, 2010 |
| Test | Fossil Fuel Pollutants | March 10, 2010 |
| Test | Global Warming Terms | March 10, 2010 |
| Test | Fuels and Pollutants | March 10, 2010 |
| Test | Glaciers, Graphs, and Timelines | March 10, 2010 |
| Test | Solar Spectrum | March 10, 2010 |
| Test | Global Warming Solutions that reduce surface warming, reduce greenhouse gases, or both. | March 10, 2010 |
| Test | Unit Measures | March 8, 2010 |
| Scatter | Engine Parts | March 5, 2010 |
| Space Race | Engine, motor, or both? | December 14, 2009 |
| Scatter | Engine, motor, or both? | December 14, 2009 |
| Test | Combo with Engine, motor, or both? and 2 others | December 14, 2009 |
| Space Race | Basic Energy and Power Terms | June 17, 2009 |
| Scatter | Energy Forms and Conversions | June 17, 2009 |
| Space Race | Alternative Energy Sources | June 17, 2009 |
| Scatter | Basic Energy and Power Terms | June 16, 2009 |