Dear Kalpita,
You know this post is going to be special when it has 3 exclamation points and CAPITAL letters. Today is my test to review everything I have learned. Ready...Set..Go!
The study of properties of matter and how matter changes is chemistry.
A substance that cannot be broken down into other substances by physical or chemical means is an element
Each element has it's own symbol which is usally one or two letters.
A substance made of two or more elements that are chemically combined is a compound.
Each compound is represented by a formula, which shows the ratio of elements in the compound
A mixture is when two substances are together in the same place but are not chemically combined into a new substance.
There are two ways a substance can change. A change that alters the form of a substance but does not change it into something else.is a psychical change
A change in matter that produces new substances is a chemical change.
The measurement of the force of gravity on an object is weight.
The measurement of how much matter an object contains is mass
The measurement of how much mass is contained in a given volume is density
Volume is the measurement of how much space an object takes up.
The smallest particle of an element is an atom
The force that holds two atoms together is a chemical bond
A combination of two or more atoms bonded together is a molecule
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