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#1. In a symphony orchestra, which instruments are biggest?
Low notes have long wavelengths, so they need long instruments for the sound waves to resonate in.
#2. True or false? The company Google was named after a very big number.
True! Google was named after the number googol, which is a 1 with 100 zeros.
#3. Soap can be made by mixing a corrosive chemical called lye, and what other ingredient?
Soap molecules are fatty on one end, and salty on the other (in this case from the lye). The fatty end sticks to grease and oil, and the salty end lets it dissolve in water!
#4. The ozone layer protects us from ultraviolet radiation, but what is ozone made of?
Ozone is oxygen, but it’s a bit different to the oxygen you breathe. A regular oxygen molecule has 2 oxygen atoms, but a molecule of ozone has 3 oxygen atoms!
#5. Which of these planets is known for the beautiful rings around it?
Saturn is known for its rings made up of billions of small chunks of rock and ice, plus other materials such as dust.
#6. What is the closest star to our Sun?
Proxima Centauri is the closest star to our Sun.
#7. 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.
#8. Salt can kill some bacteria, but how does it work?
Salt can pull the water out of living cells, in a process called osmosis.
#9. What is the name for a printed circuit board containing the principal components for a computer or other device, and allows parts of the system to communicate with each other?
The terms motherboard, mainboard and main circuit board are interchangeable. Plus, there are even more terms than these in use!
#10. Which of the following organs helps to clean your blood?
Each of these organs does a different job cleaning your blood. The spleen gets rid of old red blood cells, the liver removes toxins, and the kidneys filter out waste that is then removed in your urine.