It's Pressure
any material that can flow and takes the shape of a container and the particles easily move past each other
What is a Buoyant Force?
an upward force that fluids exert on all matter
In addition to water pressure, you also have -------- pressure on you when you're underwater.
atmospheric pressure
How are tornados created?
Tornados are are caused by a area of very low pressure on the inside and an area of high pressure on the outside. This causes the wind to rush inside the tornado.
What is pressure?
how much force is acting on a given area
What is density?
how close together the particles of something is
How does depth affect fluid pressure?
The closer to ocean level on earth there is more atmospheric pressure.
The farther down in the ocean there is more pressure there is.
How is wind created?
No matter the altitude there is higher pressure and lower pressure. Air moves from areas of higher pressure to lower pressure. This creates wind.
What is the standard unit for pressure?
Pascal (Pa)
How do some objects float?
An object will float if the buoyant force pushing the object up is the same as the force pushing it down
So when you are “sucking” on the straw you are removing air from in the straw. This causes the pressure inside the straw to be less. The outside pressure is more now. So the outside pressure is pushing the liquid into the straw.
What do you have to do to change the density of the object?
Mass and Volume
What is the atmosphere?
The atmosphere is a layer of oxygen, nitrogen, and other gases.
How do some objects sink?
An object's weight that is greater than the buoyant force it will sink
What is the fluid motion when using a vacuum?
Same concept with vacuums. The vacuum creates a area of low pressure. The high pressure around the vacuum pushes the dust and everything on the floor up into the vacuum.
How do ships float?
Steel is eight times denser than water. So they make it a curved hollow shape so it can have a bigger volume and float on the water. A increase in the ships volume decreases the density.
Air flows from ------ pressure to ------- pressure?
High pressure to low pressure
How are some objects buoyed up?
If the buoyant force on an object is greater than the object's weight the object is buoyed up
There is no such thing as --------- in science!
Sucking
How do submarines float on the surface?
Submarines fill up tanks with water which increases it mass. This causes it to be be able to sink below the surface. The submarines mass decreases so it can float on the water.