What's new

Head bones and cycads – a quick quiz

By , 28 March 2018

How well do you know your own head? This edition of the quick quiz travels from Australia all the way out into space!


Congratulations! You’re a real science whiz!

Oh dear! Better brush up before the next quiz!

#1. What is a cycad?

Cycads are plants that look a bit like palms, and they have been around since before the dinosaurs!

#2. True or false? All marsupials are native to Australia

False. Some marsupials are native to New Guinea and not Australia, and others, including opossums, are native to the Americas.

#3. What kind of scientist is most likely to study an igneous intrusion?

An igneous intrusion is where molten rock comes up through the crust. Rocks are studied by rock scientists – geologists!

#4. How many bones are there in a typical human head?

There are 29 bones in the human head – eight in the cranium, 14 in the face, one in the neck and three in each ear!

#5. Where in our Solar System is the asteroid belt?

The asteroid belt is an area of space between Mars and Jupiter, which contains many asteroids and the dwarf planet Ceres.

Was I right?

Do you know the differences between bacteria and viruses? Take a look under the microscope in Issue 23 of Double Helix magazine.

Black lightning bolt in purple circle


  1. Teeth?

    1. Hi Thor,
      Good question! Teeth are very similar to bones. they are hard, and have a similar colour. But teeth are not made of the same stuff that bones are. Bones are made of bone tissue, and teeth are made mostly of dentine and tooth enamel.

      This might not be very convincing, so I’ll leave you with one thought. If teeth are bones, how come our bodies can repair a broken bone, but not a broken tooth?

      Thanks again for your great question,


Leave a Reply

By posting a comment you are agreeing to the Double Helix commenting guidelines.

This site uses Akismet to reduce spam. Learn how your comment data is processed.