Moisture precipitates out of the atmosphere primarily as three types of rain: convective, stratiform and orographic. In each case, warm, moist air is lifted up and suspended until it reaches saturation and then discharge... More »

The three stages of stream development are youthful, mature and old age. Each stage occurs in different locations and features specific characteristics. More »

The five types of biomes -- regions of the planet that have similar climate, plants and animals -- are aquatic, desert, forest, grassland and tundra. Some authorities divide these into subcategories. More »

Interactions between the atmosphere and hydrosphere involve creation of water-related weather activity, such as rainfall, snowstorms, hurricanes and monsoons. The atmosphere contains five layers, which perform separate f... More »

Earth's atmosphere has gone through multiple distinct phases throughout its life, from a hydrogen-rich early period to the modern oxidizing chemistry. The first atmosphere Earth had was chemically very similar to the com... More »

If the temperature is below freezing, clouds release snow rather than rain. However, if the falling snow hits any pockets of air that are warmer than 32 F, that warm air turns the snow into rain. If the rain hits any col... More »

According to the University of Michigan, the primitive Earth did not have an atmosphere until gases were released from the planet's interior. Fast-moving gases and massive volcanic eruptions led to the creation of two di... More »