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Students examine CERES radiation data to understand how the Earth's tilt causes seasonal differences in incoming solar energy, and to explore how clouds, deserts and ice modulate the reflection of energy from the Sun. The investigation is conducted using the My NASA Data Live Access Server. This resource is part of the poster, Earth's Energy Budget, which describes the role of incoming solar radiation and the gases in the atmosphere and clouds in maintaining the Earth's temperature. The role of atmospheric becomes CO² in climate change and the environments of nearby planets are compared. along with career profiles of energy budget "detectives." A student crossword and matching game test vocabulary understanding.