Climate, Weather, and Geography

Because of the tilt of the Earth's axis, the Northern and Southern Hemispheres experience opposite seasons. When the Northern Hemisphere is tilted towards the Sun (summer), the Southern Hemisphere is tilted away from the Sun (winter).

Deserts are defined by extremely dry conditions with very little rainfall. Consequently, the air in these regions contains very little water vapor, resulting in low humidity.

Tropical rainforests are located near the equator, where they experience high temperatures and heavy rainfall year-round. This combination makes the climate highly humid.

Tropical rainforests are characterized by high temperatures and high levels of precipitation throughout the entire year. They do not experience dry seasons like other biomes.

Because deserts have very dry air and little cloud cover, they cannot trap heat from the sun. As a result, temperatures can soar during the day but drop rapidly to near or below freezing once the sun sets.

Cumulonimbus clouds are heavy, dense, and towering vertical clouds associated with extreme weather, including thunderstorms, lightning, and heavy precipitation. Cumulus clouds are fluffy and fair-weather, stratus are flat and layered, and cirrus are high and wispy.

Stratus clouds are low-level, featureless clouds that form in flat, horizontal layers, often covering the entire sky like a gray blanket. Cumulus clouds are puffy, cirrus are wispy, and cumulonimbus are towering storm clouds.

Physical systems refer to the natural processes that shape the Earth's surface, such as weather, climate, and plate tectonics. Wind currents, earthquakes, and climate are all natural phenomena studied under this element.

Commercial jet airliners typically cruise in the lower stratosphere, usually between 31,000 and 38,000 feet, to avoid the turbulent weather of the troposphere and benefit from stable air and fuel efficiency.

Climate refers to the long-term pattern of weather conditions in a particular area, typically averaged over 30 years. A forecast or prediction is a short-term estimate of upcoming weather conditions.

Physical features refer to the natural shapes and characteristics of the land's surface, such as mountains, valleys, and plains. Political maps show human-made boundaries, while climate refers to long-term weather patterns.

Because the Southern Hemisphere is tilted towards the Sun when the Northern Hemisphere is tilted away, their seasons are reversed. Therefore, when it is summer in the Northern Hemisphere, it is winter in South America.

As altitude increases, atmospheric pressure decreases, causing the air temperature to drop. Consequently, mountainous regions are consistently colder than low-lying coastal areas at similar latitudes.