Vocabulary

Term Definition
Matter is anything that has mass and takes up space.
Mass describes the amount of matter in an object.
Wieght is a measure of the gravitational force on an object.
Volume the amount of space that an object takes up, or occupies.
Density is a measure of the amount of mass given volume.
physical property a characteristic of a substance that can be observed and measured without changing the identity of the substance.
chemical property describes a substances ability to change into a new substance with different properties.
physical change is a change that affects one or more physical properties of a substance.
chemical change occurs when one or more substances change into entirely new substances with different properties.
law of conservation of mass states that in ordinary chemical and physical changes, mass is not created or destroyed but is only transformed into different substances.
atom are the smallest unit of an element that maintains the properties of that element.
element is made up of one or more of the same kind of atom chemically combined.
compound is made up of different kinds of atoms chemically combined.
mixture contains a variety of elements and compounds that are not chemically combined with each other.
pure substances elements and compounds.
heterogeneous mixture is one that does not have a uniform composition.
homogenous mixture.
solid substance has a definite volume and shape.
liquid substance has a definite volume but not shape.
gas does not have a definite volume or shape.