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What is Matter?. Chapter 2 Section 1. Matter. matter – anything that has mass & takes up space ( volume ). Mass vs. Weight. Mass. Weight. weight - a measure of the force of gravity on an object SI unit is the Newton (N ) can be measured using a scale ( spring)
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What is Matter? Chapter 2 Section 1
Matter • matter – anything that has mass & takes up space (volume)
Mass vs. Weight Mass Weight weight - a measure of the force of gravity on an object SI unit is the Newton (N) can be measured using a scale (spring) depends on gravity, thus is different on Earth and in space • mass - amount of matter an object contains • SI unit is the kilogram (kg) • can be measured using a balance (triple beam) • mass is the same on Earth and in space
Physical Properties Chapter 2 Section 2
Physical Properties • Examples: • color • shape • odor/smell • taste • mass • volume • state of matter • density • thermal conductivity • malleability • ductility • solubility • physicalproperty- any characteristic that can be observed without changing the identity of the matter
Density • density– the amount of matter within a given volume • Demonstration: People in a square Which square is more dense?
Density Now which one is more dense?
Density in Liquid • Object is MORE dense (higher density) it will SINK • Object is LESS dense (lower density) it will FLOAT
Liquid Layers • If you pour together liquids that don’t mix and have different densities, they will form liquid layers. • The liquid with the highest density will be on the bottom. • The liquid with the lowest density will be on the top.
Liquid Layers • Which layer has the highest density? • Which layer has the lowest density? • Imagine that the liquids have the following densities: • 10g/cm3 • 3g/cm3 • 6g/cm3 • 5g/cm3 Which number would go with which layer?
Density ALWAYS REMEMBER UNITS!
Physical Change • physicalchange- a change that changes the appearance of matter but theidentity of matter stays the same • Examples: • cutting • breaking • tearing • melting