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Matter, Properties & Changes. Density. Matter. Matter is anything that has mass and takes up space (even if you can’t see it). What types of things are made of matter?. What things aren’t made of matter?. Things that have No mass No volume (take up no space) Ideas, thoughts, dreams, etc

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Matter

Matter

Matter is anything that has mass and takes up space (even if you can’t see it)



What things aren’t made of matter?

  • Things that have

    • No mass

    • No volume (take up no space)

    • Ideas, thoughts, dreams, etc

      • Like “creativity”, “honor”, “freedom”

      • Heat

      • Light


What is matter made of
What is matter made of?

  • Atoms

    • The word, atom, comes from a greek word meaning “cannot be divided”.

    • Democritus was an ancient greek philosopher that lived from 460-370 BC

    • He was the first to write down the idea that everything can be divided into smaller and smaller pieces until a piece that cannot be divided is reached.




Describe your pencil
Describe your pencil to how that matter was formed

  • Color

  • Shape

  • Hardness

  • Dents

These are all physical properties.

Most physical properties you can detect with your senses.


Physical properties are characteristics you can observe without changing the makeup of the material


Formation
Formation without changing the makeup of the material

  • The properties of many materials are related to the way they form


States of matter
States of Matter without changing the makeup of the material

  • Solid (atoms are very close together)

  • Liquid (atoms are loosely together)

  • Gas (atoms are very spread out)

  • Plasma (ions, electrons in a superheated gas)

    • The most common state of matter in the universe

    • What stars are made of


Density
Density without changing the makeup of the material

Density is an INTRINSIC physical property that relates mass to volume.

  • Density does not change with size

  • Every element and compound has it’s own unique density

    • Since density does not change, compounds and elements can be identified by their densities.


D= mass (g, mg or kg)) without changing the makeup of the material

__________

volume (L, ml, cc)


Calculating density
Calculating Density without changing the makeup of the material

An astronomer found a small meteorite. The astronomer knew that Nickel and Iron are often found in meteorites. The meteorite has a mass of 185g and a volume of 21 ml. What is the Density of the meteorite? Is the meteorite mostly made of Nickel or Iron? (The density of Iron is 7.87g/ml. The density of Nickel is 8.9 g/ml)


Chemical properties
Chemical properties without changing the makeup of the material

  • A chemical property is a characteristic of a substance that allows it to change into a new substance.

  • Ex: Reactivity: when apples or potatoes turn brown when exposed to air

    • Or when iron rusts

  • Ex: the ability to burn is a chemical property


Physical changes
Physical changes without changing the makeup of the material

  • A physical change is any change in shape, size, phase or form.

    • The matter always stays the same





Chemical changes
Chemical changes water. Water vapor is water

  • When the original substance is changed into another substance this is a chemical change

  • Ex. When metal rusts the metal reacts chemically with oxygen and is changed into rust

  • Ex. Burning is a chemical change

  • Ex. Baking soda and vinegar


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