Vocabulary
Density and Pressure
Buoyancy and Archimedes Principle
Fluid Systems in Humans
Miscellaneous
100

A material that can flow. Gases and liquids are examples.

What is a fluid?

100

The amount of matter per unit of volume.

What is Density?

100

How much water does a 100 cm3 brick displace when submerged?

What is 100cm3?

100
What device measures blood pressure? (Please spell it too)
Blood pressure is measured using a sphygmomanometer.
100

A change in pressure at any point in a confined fluid is transmitted undiminished throughout the fluid.

What is Pascal's principle?

200

A system that uses a liquid as the working fluid.

What is hydraulic system?

200

Pascal (Pa) and Pound per square inch (psi)

What are the units of pressure?

200

The buoyant force is equal to

What is the weight of the displaced water?

200
What is asthma?
Asthma is a disease in the respiratory system that makes breathing difficult. It interferes with the noral flow of air into the lungs and causes the pathway to the lungs to become narrower.
200

An instrument used for measuring atmospheric pressure.

What is a barometer?

300

A system that uses a gas as the working fluid.

What is a pneumatic system?

300

If two holes, one near the top and one near the bottom, were made in a barrel filled with oil, which hole will have more oil forced out? Why?

The bottom hole will have more oil forced out because pressure is greater at greater depth.

300

An object immersed in a fluid has an upward force exerted on it equal to the weight of the fluid displaced by the object.

What is Archimedes' principle?

300
How much water is the human body made up of?
On average, the human body consists of about 66% percent water as it plays many important roles.
300

Why might your ear drums pop when you quickly change altitude?

Atmospheric pressure decreases with increasing altitude. Your eardrums pop to equalize the pressure on both sides.

400

The upward force exerted by a fluid.

What is the buoyant force?

400

Oak wood density = 0.8 g/cm3

Water density = 1.0 g/cm3

Which will float on oil?

What is oak wood?

400

This vessel rises by letting air in and releasing water and sinks by letting water in and releasing air.

What is a submarine?

400
When you inhale and exhale, what happens to the air pressure inside your lungs?
When you exhale, the chest cavity expands, creating an area of low pressure. When you inhale, the chest cavity contracts so the air pressure increases. This is why air rushes out of the lungs.
400

An area of low pressure due to an extremely low amount of air.

What is a vacuum?

500

The pressure measured above atmospheric pressure.

What is gage pressure?

500

The height of th water in a storage tank is 100ft above the valve. Find the pressure of the valve in lb/ft2.

The weight density of water is 62.4 lb/ft3.

What is 6240 lb/ft2?

500

The weight of a block is less than the buoyant force exerted by the water.

What is the block will float?

500
How is the circulatory system like a hydraulic system?
The heart acts like a pump to deliver blood to your blood vessels which act like pipes. The constant beating of the heart keeps blood flowing in the blood vessels.
500

How are volcanoes an example of a natural hydraulic system?

Magma flows into active volcanoes. When the flow is clogged, the pressure from the magma building up may cause the volcano to explode.

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