MATTER – PART 2

WHAT IS MATTER?

Matter - anything that has mass and takes up space

Mass - the quantity of matter contained in an object

Weight - measures force due to gravity

How do we classify different types of matter?

By Phase or State of Matter

Phase

Particle Properties

Proximity Energy Volume Shape

Solid

Liquid

Gas

close little fixed fixed

close moderate fixed not fixed

far apart a lot not fixed not fixed

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What is the difference between chemical and physical - changes and properties?

Physical Property - a characteristic of a material which is observed without a new substance produced

Examples - odor, color, volume, state (solid, liquid or gas)

melting or boiling point

Physical Change - a change where no new substance is formed

Examples - dissolving, tearing, hammering, phase changes or changes of state:

(solid ↔ liquid ↔ gas)

Chemistry - the study of matter and its changes

Chemical Property - a characteristic of a material which indicates its ability to form a new substance or not

Examples - flammability, corrosion of metals, reacting with oxygen

Chemical Change - a change that results in the production of a new substance, also called a reaction

Examples - Burning, corrosion, baking a cake

CaO + CO2 → CaCO3

Reactants → Products

Four General Signs of a Chemical Change

1. Gas formed2. Large energy change3. Precipitate formed4. Color change (change of odor & taste)