Definition
The measure of how thick or thin a liquid is, or how easily it flows.
Viscocity
All matter is made up of these.
Tiny Particles
The formula for density.
density = mass ÷ volume
Pressure = Force ÷ _____.
Area
The unit used to measure force.
Newtons (N)
The amount of space something takes up.
Volume
In which state of matter do particles move most freely?
Gas
Process for finding the volume of an irregular solid
Water Displacement
The scientist who discovered that the buoyant force equals the weight of displaced fluid.
Archimedes
Name the two types of force.
Balanced and Unbalanced Forces
A push or pull acting on an object. (STEAL 200 points)
Force
Heating a liquid usually does this to its viscosity.
Decreases it
A rock has a mass of 60 g and a volume of 30 mL. Find its density.
2 g/mL
When area increases but force stays the same, pressure does what?
Decreases
Pneumatic systems use gas or liquids? (DOUBLE)
Gas
This is how you can predict whether an object will float or sink in a fluid
Density
Viscosity describes how easily a fluid does this. (STEAL 200 points)
Flow
When you increase the mass but keep the volume the same, density does this.
Increases
The unit for pressure
Pascals (Pa)
Pressure acts in this direction inside a fluid. (STEAL 200 points)
equally in all directions/evenly distributed.
In a fluid, whether it’s a liquid or a gas, the particles are moving and colliding in every direction. These collisions cause pressure that pushes up, down, sideways and in every direction at the same time.
The upward force acting on objects in fluids.
Buoyant Force
Name two key points of the Particle Theory of Matter. (DOUBLE)
particles are always moving, all matter is made of particles, particles have spaces, particles move faster when heated (temperature), particles are attracted to one another.
Explain why a large metal ship can float even though metal is dense. (DOUBLE)
The ship’s shape traps air, increasing its volume and lowering its average density so the buoyant force equals its weight
OR
because its average density (metal + air) is less than water
Why does a life jacket help you float? (steal 200 points)
it increases your volume without adding much mass, lowering your average density
Why do snowshoes stop you from sinking into deep snow?
they spread your weight over a larger area, reducing pressure