Arctic tundra experiences extreme temperatures from 4°C to –32°C. Alpine tundra has milder climate with temperatures ranging from 3-12°C. Arctic tundra receives less than 38 cm annual precipitation. Alpine tundra receives more precipitation, up to 64 cm annually
Human influence has warmed atmosphere, ocean and land since pre-industrial times. Around 200 scientific organizations worldwide support this consensus. Greenhouse gases have increased significantly since Industrial Revolution
Earthworms belong to the Annelida phylum and feed on organic matter in soil. They are brown in color and have segmented bodies divided into 14-16 segments. Earthworms are hermaphrodites with both male and female organs
Soil is the loose material covering Earth's surface. Composed of minerals, organic matter, water, and air. Forms through weathering of rocks through sun, wind, and rain. Contains three main layers: topsoil, subsoil, and bedrock
Solid part of earth's surface or corresponding celestial body part. Ground or soil of specified situation or quality. Part of earth's surface with natural resources. Country or rural area characterized by farming or ranching. People of a country
Factors of production are inputs needed for creating goods and services. Four main factors: land, labor, capital, and entrepreneurship. Control of factors determines wealth in society