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Sizing up the Sun – a quick quiz

By David, 9 May 2018 Quiz

Here’s a quiz to get your brain pumping. Test your knowledge of floating metals, and not one but two questions about the closest star to home – our Sun!

Q #1: What is a pademelon?

Pademelons are like small wallabies and can be found in New Guinea, Tasmania and the east coast of mainland Australia.

Q #2: True or false? Aluminium is less dense than water, so it always floats on water.

False. Aluminium is denser than water, so it will typically sink unless it’s hollowed out. There are times aluminium will float on water, such as an empty aluminium can. In this case, it’s actually the air inside the can that’s making it float!

Q #3: At what temperature are Celsius and Fahrenheit the same?

At -40 degrees Celsius, it’s also -40 degrees Fahrenheit. Fahrenheit degrees are spaced closer together than Celsius, so water freezes at 32 degrees Fahrenheit or 0 degrees Celsius.

Q #4: What element is the Sun mostly made of?

The Sun is about 70% hydrogen, 28% helium and 2% other elements.

Q #5: In which month is Earth closest to the Sun?

Earth is closest to the Sun in January. It’s about five million kilometres closer than in July, which might seem like a long way, but it’s only a fraction of the average 150 million kilometres to the Sun.

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Black lightning bolt in purple circle

6 comments

  1. I would query answer #4 as there are numerous papers that suggest the sun is predominantly iron

      Reply
    1. Hi John,
      I checked in with our Astronomy and Space Science department, and they were very definite that the Sun is mostly hydrogen. They said that, like most stars in our galaxy, our Sun is a main sequence star, and it is powered by the fusion of hydrogen into helium.

      Thanks for the question,
      David

        Reply
  2. too difficult to use the web

      Reply
    1. Hi Sue,
      Thanks for your feedback! looks like our blog migration hasn’t solved all our problems. We’ll keep working on it!

      Cheers,
      David

        Reply
  3. There must be something wrong with your program. I got all the answers correct but was told I got 4/5 80%

      Reply
  4. Hi David,
    Sorry to hear that! I just tried the quiz and I can get 100% – can I ask which browser you’re using?

    Cheeers,
    David

      Reply

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