| Term | Definition |
| What does mercurys surface look like? | looks somewhat similar to the far side of Earth's moon. |
| Surface Features : Mercury | mercury has cratered highlands like the ones on the moon, mercury is very dense, it has scarps (deep slopes) |
| Surface Temperature:Mercury | mercury has the greatest temperature extremes of any planet |
| venus | named for the goddess of love and beauty |
| Surface Features: Venus | basaltic volcanism and tectonic activity shape venus's surface. based on the low density of impact craters, these forces must have been very active during the recent geologic past. |
| Surface temperature: Venus | atmosphere is 97% carbon dioxide. |
| Mars | . |
| the martian atmosphere | the atmosphere of mars is very thin. extensive dust storms occur and cause color changes observed from Earth. Hurricane force winds up to 270 km/hr can go on for weeks. |
| water on mars | some areas exhibit drainage patterns similar to those created by streams on earth. groundwater has recently migrated to the surface. |