How much do you know about amazing science facts?

Even if you’re a scientist, this list might just surprise you. These are some amazing science facts you have never known before.

1. 20% of Earth’s oxygen is produced by the Amazon rainforest

The Amazon rainforest covers 5.5 million square kilometres (2.1 million square miles) of Earth

Our atmosphere is made up of roughly 78 per cent nitrogen and 21 per cent oxygen, with various other gases present in small amounts. The vast majority of living organisms on Earth need oxygen to survive, converting it into carbon dioxide as they breathe. Thankfully, plants continually replenish our planet’s oxygen levels through photosynthesis. During this process, carbon dioxide and water are converted into energy, releasing oxygen as a by-product. Covering 5.5 million square kilometres (2.1 million square miles), the Amazon rainforest cycles a significant proportion of the Earth’s oxygen, absorbing large quantities of carbon dioxide at the same time.

2. Some metals are so reactive that they explode on contact with water

This is what happens when sodium reacts with water

There are certain metals – including potassium, sodium, lithium, rubidium and caesium – that are so reactive that they oxidise (or tarnish) instantly when exposed to air. They can even produce explosions when dropped in water! All elements strive to be chemically stable – in other words, to have a full outer electron shell. To achieve this, metals tend to shed electrons. The alkali metals have only one electron on their outer shell, making them ultra-keen to pass on this unwanted passenger to another element via bonding. As a result they form compounds with other elements so readily that they don’t exist independently in nature.1. Water can boil and freeze at the same time

Seriously, it's called the 'triple point', and it occurs when the temperature and pressure is just right for the three phases (gas, liquid, and solid) of a substance to coexist in thermodynamic equilibrium. This video shows cyclohexane in a vacuum.

3. Lasers can get trapped in a waterfall

Oh my gosh, yes. Not only is this an incredible example of total internal reflection, it also shows how fibre optic cables work to guide the flow of light.

4. An egg looks like a crazy jellyfish underwater

A cracked egg on land might make a big mess, but 18 metres (60 feet) below the surface of the ocean, the pressure on the egg is 2.8 times atmospheric pressure, and it holds it all together like an invisible egg shell. True story.

5. You can prove Pythagoras' theorem with fluid

Not buying what your maths teacher is selling when they tell you a2 + b2 = c2? You can actually prove it with liquid.

6. This is what happens when a black hole swallows a star

NASA

As the star gets sucked up into the black hole, a huge jet of plasma is burped out, spanning hundreds of light-years. "When the star is ripped apart by the gravitational forces of the black hole, some part of the star's remains falls into the black hole, while the rest is ejected at high speeds," explains Johns Hopkins University researcher, Suvi Gezari.

7. You CAN see without your glasses
According to MinutePhysics, all you need to do is make a pinhole with your hand, which will help you focus the light coming into your retina. Sure, it won't give you 20/20 vision, but it's a good start if you've left your glasses at home.

8. This is how a face forms in the womb

Embryonic development is an incredibly complex process that scientists are still just beginning to understand. But one thing researchers have been able to map out is how the embryo folds to create the structures of the human face in the womb. We could watch this all day.

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Posted by factsoflifeforkids