Models of Our Planet
| comets | coordinate system | day |
| daylength | eclipses | horizon |
| hydrosphere | latitude | length of daylight |
| length of one day | length of the year | lithosphere |
| longitude | meteor showers | moon |
| motion | nitrogen | orbit |
| oxygen | phases of the Moon | phenomena |
| planets | rocks | rotation’revlution |
| seasons | shape of the Earth | solar system |
| Sun | tides | tilt of Earth’s axis |
| trace gases | water vapor | year |