My Journal
At the beginning og the class the teacher told us that almost everyone sent the journal on Thursday and he said we must send it a day after the class.
The rest of the class was only theory, in other terms: write and write and write.
Mixtures are combinations of two or more substances in wich they retain their distinct identities.
A pure substance is a form of matter that has a definite composition and distinct properties.
An element is a substance that cannot be decomposed into simpler substance by a chemical change.
A compound is a substance made of 2 elements chemically united by fixed proportions. The elements in a compound cannot be separated by physical means, because they´re held together by chemical bounds.
States of matter
Solid (s): Rigid, fixed volume, fixed shape.
A solid has a definite shape and it takes up a fixed shape.
Liquid (l): Definite volume, but no definite shape.
A liquid will change its shape to fit its container.
Gas (g): No fixed shape, no fixed volume.
A gas will change its shape to fit its container, but it will also expand to fill the volume.
Erin Alicia Gil
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