About This Quiz & Worksheet About This Quiz & Worksheet Earth's climate and energy will be the subject of these study tools. While completing the interactive quiz, you'll be responsible for knowing about specific topics like the five physical systems of Earth and the definition of the albedo...
For example, 58% of MSNBC viewers and more than half of viewers of ABC, CBS, and NBC said they think humanity could become extinct or nearly extinct within a century. About one-quarter of CNN and MSNBC viewers believe humanity could become extinct within 50 years du...