Interesting Facts About Science Facts-003
1. The Moon’s largest crater, the SOUTH POLE–AITKEN BASIN, is 1,550 miles(2,500 km) wide and5 miles (8 km) deep!
2. Oxygen becomes a BLUE LIQUID when it is frozen below -270°F(-168°C).
3. The frequencies of less than 20 Hz (lower limit of audible frequencies) are called infrasonic and those above the upper limit of audible frequencies 20,000 Hz are called ultrasonic (supersonics) waves.
4. Decibel is the unit of measuring the intensity of a sound.
5. The red light is scattered the least and the violet is scattered the most. That’s why red signals are used to indicate dangers. Such a signal appears to be visible to large distances without an appreciable loss due to scattering.
6. ICE AGES are periods of time when Earth’s climate is cold enough for sheets of ice to cover large areas of the planet.
7. Human HEART beats 100,000 times every day and is the only muscle that never rests.
8. Sometimes we look at colours in the region of black and white. These colours are called phantom colours. It can be observed on black and white TV sometimes when pictures pass very rapidly.
9. When we touch a piece of iron and wood placed in the same room, we feel iron to be colder than the wood the reason behind it is good conduction of heat by the iron.
10. Ice does contain heat, it is 80 cal/gram at 0°C.
11. Some mushrooms are edible, but many are poisonous. Some contain a chemical called psilocybin that can cause hallucinations.
12. Redwood trees can live for more than 3,000 years.
13. Octopuses have three hearts— two to pump blood to their gills and one to pump blood around the body.
14. Osborne Reynolds (1866) derived the equation of viscous flow. This completed the classic model of friction (static, kinetic, and fluid) commonly used today in engineering
15. Vehicles have an instrument called a speedometer. It records the speed directly in km/h. There is also another meter that measures the distance moved by the vehicle. This meter is known as an odometer.