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Unit 1 lesson 1-4

Matter and enrgy

Matter is anything that takes up space and has mass
Mass describes the amount of matter in an objects
Weight is a measure of gravitational force on an object
Volume the amount of space that an object takes up
Density is a measure of the amount of mass in a given volume
Physical Property a characteristic of a substance that can be observed and measured without changing the identity of the subsence
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
Atoms are the smallest unit of an element that maintains the properties of an 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 compound that are not chemically combined with each other
Pure Substances elements and compounds
Heterogeneous a mixture that does not have a uniform composition
Homogeneous a mixture with sweet taste
Solid substance has a definite volume and shape
Liquid substance has a definite volume but not a definite shape
Gas does not have a definite volume or shape
Freezing when a liquid becomes a solid
Melting when a solid becomes a liquid
Evaporation when a liquid becomes a gas
Condensation when a gas becomes a liquid
Sublimation when a solid becomes a gas
Deposition when a gas becomes a solid
Created by: 18kerstingj1028