Saturday 22nd April 2023
    Difficulty: Easy

    Explaining the universe (Quiz #155)

    Photo by <a href="https://unsplash.com/@grakozy?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText">Greg Rakozy</a>
    Photo by Greg Rakozy (Unsplash)

    Questions inspired by the Observer article "Baffled by black holes? Confused by quantum theory? Explaining the universe one small step at a time", which seeks to explain very complex scientific ideas in simple terms.

    1. Which of these phrases explains Einstein’s special theory of relativity "in a nutshell"?

    2. Carbon dioxide in the atmosphere has a huge effect on global warming. What percentage of the atmosphere is carbon dioxide?

    3. There is a black hole at the heart of our galaxy which has a mass 4.3 million times that of our Sun. In black hole terms, what is this?

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