Properties of Matter
Anything that has mass and uses space.
Matter.
We can classify matter into two main categories.
Pure substances and mixtures.
What is a physical change?
A physical change is any change in matter from one state to another, but there is no chemical reaction involved.
What is a chemical change?
Is the result of a chemical reaction that creates a new substance with different propierties.
Frying an egg
What is chemical change?
How resistant an object is to scratching or pressure.
Hardness.
We use this method to separate an insoluble substance from a liquid.
Filtration
Matter can change...
Shape, position and texture.
How many chemical changes do we know?
Oxidation, Combustion, Fermentation and Heating.
What are mass and volume?
Mass is the amount of matter in an object.
Volume is the space that matter occupies.
We use a magnet to separate heterogeneous solid mixtures.
Magnetic separation.
What means that matter can change position?
It can move to a different place without changing its propierties.
Fold paper to make an origami structure.
The amount of matter in a volume. It can tell us if objects float or sink.
Density
We use this method to separate a pure liquid from a mixture of liquids.
Distillation.
Can you name a reversible physical change and an irreversible physical change?
Own answers.
What is combustion?
It shows how well a material can conduct heat.
Thermal conductivity.
This method uses gravity to separate a mixture of solid and liquid or a mixture of two liquids.
Decantation.
What means that physical changes can be reversible or irreversible?
This means there are changes that are temporary but other changes are permanent.
What is fermentation?
A chemical reaction where fungi or bacteria change organic substances into other substances.
Baking a cake
Chemical change