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Listed under:  Science  >  Forces and energy  >  Molecular forces  >  Pressure

Flow meter, c1923

This is a Type A 'Orivent' Meter Recorder at the No 4 pumping well at Spotswood Pumping Station. The meter features a chart recorder to record fluctuations in water pressure, and the rate of flow was indicated on six small dial gauges. The instrument is enclosed in a glass case.

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Implode a soft drink can using an invisible force

Can you imagine being able to crush a can without hitting or squashing it? Watch as Ruben the Surfing Scientist shows you how this can be done. Listen to Ruben explain the science behind the imploding can and find out what invisible force is involved.

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Properties and behaviour of gases

All substances are made up of tiny particles. A change in temperature can change the way these particles behave. Watch as the Surfing Scientist demonstrates how a gas behaves when it is heated. Find out whether the balloon gets sucked or pushed into the bottle!

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Name these mystery objects

Compete in a game show against characters Einstein and Pythagoras to identify three different mystery objects. Each of the objects is the end product of a science demonstration. Compare your ideas and predictions with the host Bernie Hobbs's identification of the objects and her explanation of the science behind them.

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Surviving a bed of nails

Watch the Surfing Scientist, Reuben Meerman, and Dr Karl persuade Adam Spencer to lie on a bed of nails and then use science and maths to explain what happens. Check out what happens next when they smash a concrete block on his stomach while he's lying on the bed of nails.

Teacher resource

Backyard Science: forces

This resource, including student videos, provide opportunities for students to identify types of forces, determine whether forces are balanced or unbalanced and compare water and air resistance. They will conduct an investigation into the relationship between friction and different types of surfaces. Students will design, ...


Building a pressure shaft, 1954

This is a black-and-white photograph of three men working on the site of the pressure shaft, or penstock, above Tumut 1, a power station in the Snowy Mountains Hydro-electric Scheme in New South Wales. They are standing on an extremely steep slope apparently clearing the area of vegetation and debris.


Plugging leaks, c1930s

This is a black-and-white photograph from the 1930s showing two men in a trench repairing a leak in the pipeline that supplies water to Western Australia's arid gold fields. The escaping water is shooting metres into the air, drenching the workers and turning the bottom of the trench in which they are working into mud. ...


I Can Jump Puddles, 1981: 'She's got a heart like a bullock!'

This clip shows Alan's loyal friend Maggie (Sally Anne Bourne) taking great delight in disproving an experiment by the teacher, Mr Tucker. Previously Mr Tucker had ridiculed Alan for theorising that 'air doesn't weigh anything'. The clip then shows Alan's friends happily pushing him home in his 'pram'. When a wheel falls ...


Weather observation: datasets

This website contains datasets for weather including humidity, water temperature, winds and air pressure collected at marine sites. The collection points are displayed on an interactive coloured map. Historical weather data are available. Graphs can be created and downloaded. The page also contains links to web cameras ...

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Floating ping pong ball

A ping pong ball usually floats on the surface of water. Watch what happens to a ping pong ball in a tank of water as Ruben Meerman, the Surfing Scientist, experiments with the pressure of the air. (air pressure)


Lakes in Antarctica

Scientists are not complacent. We still have a lot to learn about the water cycle. The discovery of glacial lakes under the ice in Antarctica actively transporting water between reservoirs was a surprise. These lakes can be up to 3km beneath the ice sheets. The pressure of the ice above helps to melt the ice, forming lakes. ...

Interactive Resource

experiMENTALS: Levitating balloon

This resource contains a materials and instruction list and brief explanation for students about the process of levitating a balloon.