8.1 weight mass and volume

Weight- the force of gravity acting on an object

Mass- the amount of matter that makes up an object or substance

Volume- The amount of space an object or substance takes up

You can measure volume by using the formula (length x width x height) to measure the volume in cubic units of measurement 

You can find the volume of a irregular object by dropping it in liquid and measuring how much water came out after it was displaced

Displaces- to take the place of

8.3 Density

Density- a measure of the mass per unit volume of a substance

The more particles in a substance or object, the more dense it is

You can use the particle theory to help explain density

Buoyancy: The upward force created by a fluid that opposes the weight of an object.

Positively Buoyant: The buoyant force is strong enough to keep the object above the water level.

Negatively Buoyant: The buoyant force is not strong enough to support the object.

Neutrally Buoyant: The object neither sinks nor floats.

Archimedes Principle:

Archimedes Principle states that the buoyant force is equal to the weight of the displaced water. if an object weighs more than the upward force (buoyant force) the object will sink.