Earth as the planet for life | Middle school Earth and space science | Khan Academy

Earth is the perfect planet for life as we know it! It orbits the Sun in the habitable zone, where planetary temperatures allow water to exist as a liquid. Scientists believe this is important because life as we know it requires solution-based chemistry, and water is a very common and versatile solvent. Earth also has a breathable atmosphere that keeps the planet warm, an ozone layer to protect against UV light, and a magnetic field that shields the planet from the harmful solar wind. ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc