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#1. True or false? Inge Lehmann discovered Earth’s inner core by studying earthquake waves.
True! Waves from earthquakes travel through the planet, and some of them reflect off the inner core.
#2. In which year did Captain Charles “Chuck” Yeager become the first pilot to break the sound barrier?
Captain Charles “Chuck” Yeager of the United States Air Force broke the sound barrier on 14 October 1947 flying the Bell X-1 rocket-powered plane.
#3. True or false? There are places known as ‘cleaning stations’, where large sea creatures go to get cleaned by smaller creatures.
True! Cleaner wrasses, cleaner gobies and cleaner shrimp all congregate at cleaning stations.
#4. What mineral has a hardness of 1 on Mohs scale?
Talc has a hardness of 1 on Mohs scale, which means it’s actually very soft. Diamond is at the other end of the scale with a hardness of 10.
#5. True or false? Lightning never strikes the same place twice.
False. Lightning can strike the same place multiple times. In fact, lightning ionises (charges) the air as it passes, making repeat strikes much more likely for a few seconds.
#6. What is the name for a triangle with sides that are all different lengths, and all the angles are a different size?
A scalene triangle has sides of all different lengths, and all different angles.
#7. True or false? Scorpions will glow if you shine ultraviolet (UV) light on them.
True. Scientists aren’t sure why scorpions fluoresce or glow under UV light. It might help them hunt, or find a mate, or to sense when they’re in in sunlight during the day.
#8. In maths, 3 of these terms describe extreme values. Which of the following is NOT a mathematical term?
Cardamum (also commonly spelt cardamom or cardamon) is a spice made from the seed pods of various plants in the ginger family.
#9. Which part of the eye holds the rods and cones that turn light into nerve signals?
The rods and cones that turn light into nerve signals are found in the retina on the back of the eye.
#10. A place called Lake Maracaibo has more lightning than anywhere else on Earth, but which of the following best describes it?
Lake Maracaibo is the largest lake in South America, and it has lightning storms about 300 days per year.
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