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unit 2 ch.1
study guid
Question | Answer |
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Different molecules can have different sizes, weights, shapes, and attraction strength. They are similar because they are all made of atoms and they all make up matter. | All molecules of one substance are the same. |
Different molecules have different properties. | All matter is made up of atoms. |
Atoms are the smallest pieces of matter | Water molecules are highly attracted to each other and many other kinds of molecules |
Property - what you can observe or measure about something that helps you identify or describe it. | Substance - matter that is made of only one kind of atom or molecule. |
Mixture - matter that is made of more than one substance. | Observe - to use any of the five senses to gather information about something. |
Matter - the stuff that things are made of. | Atom - a tiny piece of matter that is too small to be seen. |
Molecule - a group of atoms joined together in a particular way. | Molecule - a group of atoms joined together in a particular way. |
Model - something scientists make to answer a question about the real world. | Attract - to pull an object, even without touching it. |
Evidence - information that supports an answer to a question. | Inference - something you figure out based on observations and what you already know. |
Chromatography is a technique used to separate mixtures into their component substances. |