| Object | Length | Choices |
| Altitude of Earth's ozone layer | |
| Altitude of satellite | |
| Baseball bat | |
| Diameter of . | |
| Diameter of aorta | |
| Diameter of CD | |
| Diameter of DNA molecule | |
| E. coli | |
| Height of Mt. Everest | |
| Height of Washington Monument | |
| Large protein molecule | |
| Orbital radius of Earth (around Sun) | |
| Orbital radius of Moon (around Earth) | |
| Pitcher's mound to home plate (MLB) | |
| Radius of Earth | |
| Radius of hydrogen atom | |
| Red blood cell | |
| Smallpox (variola) virus | |
| Wavelength of green light | |
| Altitude of Earth's ozone layer | |
| Altitude of satellite | |
| Baseball bat | |
| Diameter of . | |
| Diameter of aorta | |
| Diameter of CD | |
| Diameter of DNA molecule | |
| E. coli | |
| Height of Mt. Everest | |
| Height of Washington Monument | |
| Large protein molecule | |
| Orbital radius of Earth (around Sun) | |
| Orbital radius of Moon (around Earth) | |
| Pitcher's mound to home plate (MLB) | |
| Radius of Earth | |
| Radius of hydrogen atom | |
| Red blood cell | |
| Smallpox (variola) virus | |
| Wavelength of green light | |