An awesome video has emerged of two science teachers trying out a huge liquid nitrogen bottle rocket during the National Science Week in Australia.

The footage, shot on Friday at a school on the Central Coast, NSW, shows science teachers Jacob Strickling and Andrew Watt filling the 15 litre tank of their giant bottle rocket with two litres of liquid nitrogen.

Then, they set the rocket upright and the liquid nitrogen starts boiling and turns "into gas which causes the pressure to build up".

When the pressure is too high, the rubber stopper which seals the tank pops and the rocket launches.

"Unfortunately the rocket was a bit of a fail, and the cameraman has a bit of a laugh and giggle at the failure" Jacob Strickling wrote online.

"The teachers also tried water in the rocket which was pressurised using a portable air compressor. When the pressure built up high enough, the water is pushed out the bottom of the rocket, which in turn pushes the rocket up (Newtons Third Law)" he added.

August 13th to 20th was National Science Week in Australia.
At this school on the Central Coast, New South Wales , Australia, these two Science Teachers, Jacob Strickling (who is the creator of the Make Science Fun YouTube Channel) and Andrew Watt launch a giant water bottle rocket for the first time.
Bottle rockets normally have a 1.25 litre plastic bottle in them, this rocket has a 15 litre office water bottle.
In the first trials, about two litres of liquid nitrogen were poured into the bottle which is at the base of the rocket. A large rubber bung is then hammered in.
The rocket is set upright, as the liquid nitrogen which has a temperature of -196 Degrees Celsius boils, it turns into gas which causes the pressure to build up. Eventually the pressure is so high it blows the bung out the back launching the rocket.
Unfortunately the rocket was a bit of a fail, and the cameraman has a bit of a laugh and giggle at the failure. Nonetheless, the hundred's of children watching had a great time.
You may notice some racing drones in the background which were actually the main event.
The Teachers also tried water in the rocket which was pressurised using a portable air compressor. When the pressure built up high enough, the water is pushed out the bottom of the rocket, which in turn pushes the rocket up (Newtons Third Law).
There are also a few smaller rockets which are launched using liquid nitrogen and also water with air pressure.