Explore Climate Regions: Temperature and Precipitation Patterns in Biomes

Temperature measures how hot or cold the air is in a region. Precipitation is any form of water that falls from clouds to the ground including rain, snow, sleet, and hail. Together, these two measurements determine which plants and animals can survive in a biome.

You have already explored Weather Patterns and Long-Term Weather Trends and Seasonal Changes and Earth's Tilt and Orbit. Those topics help you understand why temperature and precipitation change across regions and seasons.

Each biome has a unique combination of temperature and precipitation. Here is a quick look at the major biomes you need to know:

Tropical Rainforest: Found near the equator, this biome is hot and very wet all year. It receives more than 200 centimeters of rain per year and has the greatest biodiversity on Earth more than half of all plant and animal species live here.

Desert: Deserts receive less than 25 centimeters of precipitation per year. This extreme dryness makes it very hard for most plants to survive. Only specially adapted plants like cacti, which store water in their thick stems, can live there.

Temperate Deciduous Forest: This biome has four distinct seasons cold winters, warm summers, and moderate rainfall. Trees called deciduous trees shed their leaves in autumn to conserve water and energy during winter.

Taiga (Boreal Forest): The taiga is the largest land biome on Earth. It has long, cold winters with heavy snowfall and short, cool summers. Evergreen conifer trees like spruce and pine dominate this biome. They keep their needle-like leaves all year so they can start growing quickly when spring arrives.

Tundra: Located near the North and South Poles, the tundra is extremely cold and surprisingly dry it receives less than 25 centimeters of precipitation per year, similar to a desert. Beneath the surface lies permafrost, a layer of ground that stays frozen all year long. Permafrost prevents deep roots from growing, so only small, low plants survive here.

Grassland/Savanna: Grasslands receive more rainfall than deserts but not enough to support large forests. The savanna is a tropical grassland with warm temperatures and two clear seasons a wet season and a dry season. Animals like lions, zebras, and elephants are adapted to the African savanna.

Climate: Climate is the average weather conditions in a region over many years. You measure climate over at least 30 years to find reliable patterns, not just what happens on one day.

Precipitation: Precipitation is any form of water that falls from clouds to the ground. You experience precipitation as rain, snow, sleet, or hail depending on the temperature.

Temperature: Temperature measures how hot or cold the air is in a place. You use temperature to compare biomes and understand which living things can survive there.

Biome: A biome is a large region of Earth with similar climate, plants, and animals. You can find many different ecosystems inside one biome.

Tropical: Tropical regions are found near the equator where it is warm and wet year-round. You will find tropical rainforests and savannas in these regions.

Polar: Polar regions are found near the North and South Poles and are extremely cold. You will find the tundra biome in polar regions.

Rain: Rain is liquid water that falls from clouds. You find the most rain in tropical rainforest biomes near the equator.

Snow: Snow is frozen water crystals that fall from clouds. You find heavy snowfall in cold biomes like the taiga and tundra.

Arid: Arid means very dry with very little precipitation. You would describe a desert as an arid region.

Temperate: A temperate climate has mild temperatures that are not extremely hot or extremely cold. You experience four seasons in a temperate climate zone.

Seasonality: Seasonality describes how temperature and precipitation change in a predictable pattern over the course of a year. You can see seasonality in biomes like the temperate deciduous forest, where leaves fall in autumn and grow back in spring.

Permafrost: Permafrost is a layer of soil and rock beneath the ground that stays frozen all year long, even in summer. You find permafrost in the tundra biome, where it stops deep plant roots from growing.

Biodiversity: Biodiversity means the variety of different living things in a region. You will find the greatest biodiversity in tropical rainforests because the warm, wet climate supports so many species.

Deciduous: Deciduous trees shed their leaves each autumn and grow new ones in spring. You can find deciduous trees in the temperate deciduous forest biome.

Evergreen: Evergreen trees keep their leaves all year long. You find evergreen conifer trees like spruce and pine in the taiga biome.

You can test your understanding by matching each biome to its climate description. Ask yourself: Is this biome hot or cold? Is it wet or dry? Does it have seasons? These three questions will help you identify any biome.

You can also practice by thinking about Terrestrial Biomes and Land-Based Ecosystem Types and Aquatic Biomes and Water-Based Ecosystem Types to see how climate patterns shape both land and water environments.

You have already learned important ideas that connect to this topic. Your knowledge of Ecosystem Components and Living and Non-Living Elements and Communities and Interaction Between Populations helps you understand how climate shapes entire ecosystems.

You also explored Structural Adaptations and Physical Features for Survival and Behavioral Adaptations and Actions That Aid Survival. These topics show you why animals in the tundra have thick fur and why desert plants store water all because of climate patterns.

Your understanding of Environmental Knowledge and Local Ecosystem Understanding also connects here, helping you recognize how your own local climate fits into the bigger picture of global biomes.

This topic connects to many other important science ideas. As you move forward, you will explore System Interactions and Biotic and Abiotic Factors, where you will see how climate patterns interact with living and non-living parts of ecosystems. You will also study Environmental Systems and Human Effects on Ecosystems, where you will learn how climate change can shift biome boundaries and harm native species.

Climate patterns also connect to Matter Cycles including the Water, Carbon, and Nitrogen Cycles and Energy Flow through Food Webs and Energy Transfer. The amount of precipitation and temperature in a biome directly affects how water moves through the environment and how energy flows through food webs.

You can also explore Revolution Effects and Seasonal Changes to understand why Earth's orbit around the sun creates the seasonal temperature and precipitation patterns that define each biome.