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#1. Which of the following is not a unit of measurement included in the International System of Units (SI)?
When it comes to mass, the kilogram is the SI unit. There are about 2.2 pounds in a kilogram.
#2. In 1967, Jocelyn Bell discovered something that sent out pulses of radio waves, but what was it?
Pulsars are spinning neutron stars that send out pulses of radio waves.
#3. Which bird has the widest wingspan?
The largest wandering albatrosses have wingspans around 3.7 metres. That’s about the same as 2 adults lying end to end!
#4. Some cultures see a smiling face when they look at the Moon. What are the dark patches you can see actually?
The dark plains on the surface of the Moon have the names of lakes and seas, but they are caused by asteroid impacts.
#5. What happens to ocean waves when the ocean gets shallow?
Waves slow down when they hit shallow water, such as a sand bar or beach. Since the front of the wave gets there and slows down first, the wave gets taller and eventually it breaks.
#6. How fast does a Mexican wave travel around a stadium?
In 2002, researchers studied 14 Mexican waves and found they moved at about 20 seats per second, and they were about 15 seats wide!
#7. How long does it take for light to travel from the Sun’s surface to Earth?
We orbit the Sun at a distance of about 150 million kilometres. Light moves at 300,000 kilometres/second. Divide these and you get 500 seconds, or 8 minutes and 20 seconds.
#8. Padparadscha is the name for the orange variety of what popular gemstone?
Sapphires can come in almost any colour except red (these are rubies). Orange sapphires are among the rarest of all sapphires ranging in colour from a brilliant orange to orange-pink.
#9. What does this emoji 😆 mean to most people?
The ‘smiling face with open mouth and tightly closed eyes’ emoji is the world’s most confusing. In a US study, scientists found that half of people thought it was a positive emoji, and half thought it was negative!
#10. What’s the biggest native animal that lives in Australia?
Estuarine crocodiles (also known as saltwater crocodiles) can grow to 7 metres long, and can weigh more than one tonne!
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