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chapter2scienc

vocab cards

QuestionAnswer
physical change Any change that alters the form or appearance of matter but does not make any substance in the matter into a different substance
chemical change A change in matter that produces one or more new substances or a chemical reaction
Law of conservation of matter the fact that matter is not created or destroyed in any chemical or physical change
matter anything that has mass and takes up space
substance a single kind of matter that is pure, meaning it always has a specific form
physical property a characteristic of a pure substance that can be observed without changing into another substance
chemical property a characteristic of a pure substance that describes its ability to change into different substances
element a pure substance that cannot be broken down into any other substances by chemical or physical means
atom is the basic particle from which all elements are made
chemical bond when two atoms combine which is a force of attraction between two atoms
molecules a larger particle that is made form the combining of atoms held together by chemical bonds
compound a pure substance made of two or more elements chemically combined in a set ratio
chemical formula shows the elements in the compound and the ratio of atoms
mixture made of two or more substances, elements, compounds or both that are together in the same place but not chemically combined
heterogeneous mixture when you can see the different parts in the mixture (don't mix)
homogeneous mixture evenly mixed so you cannot see the different parts (completely mixed)
solution a homogeneous mixture because two things are completely mixed together
Created by: samjones
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