Chapter 1 Notes

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# Chapter 1 Notes - PowerPoint PPT Presentation

Chapter 1 Notes. The Properties of Matter. What is Matter?. Matter is anything that has Mass and Volume Mass is the amount of matter an object contains. Units: grams (g), kilograms (kg) Volume is the amount of space an object takes up.

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## Chapter 1 Notes

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### Chapter 1 Notes

The Properties of Matter

What is Matter?
• Matter is anything that has Mass and Volume
• Mass is the amount of matteran object contains.
• Units: grams (g), kilograms (kg)
• Volume is the amount of space an object takes up.
• Units: liquids: liters (L), milliliters (mL),

Solids: cubic centimeters (cm3)

mL = cm3

Vocabulary YOUneed to know!

Meniscus

Read at the bottom of the meniscus!

Physical Properties
• Physical properties can be observed or measured without changing the identity of the matter.
• Examples:
• Color
• Odor
• Mass
• Volume
• Density (Density = Mass/Volume)
• State – Solid, Liquid, or Gas?
• Malleability – Can I flatten it?
• Ductility – Can I stretch it into a thin wire?
• Solubility – Can I dissolve it in something?
• Thermal Conductivity – Does it carry heat?
Chemical Properties
• Chemical properties describe a substance’s ability to change into a new, different substance with different properties.
• Examples:
• Flammability – Does it burn?
• Reactivity – Does it react when mixed with some other substance to make a new substance?
Characteristic Properties
• Characteristic properties are always the same, whether the object is large or small.
• Characteristic properties can be physical or chemical.
• Examples: Examples that are NOT:
• DensityᵒSize
• Solubility ᵒ Volume
• Reactivity ᵒ Shape
• Boiling Point ᵒ State of Matter
Physical Changes
• In a physical change, a physical property changes, but the identity of the substance does not change.
• Physical changes are sometimes easy to undo
• Examples:
• Melting ice or boiling water
• Ripping paper into pieces
• Dissolving sugar into water
Chemical Changes
• In a chemical change, a substance changes into a different substance.
• Chemical changes are usually difficultto undo.
• Examples:
• Burning wood or “snakes”
• Spoiling milk (curdling)
• Rusting metal
• Baking a cake
Evidence of a chemical change
• Change in color (unexpected)
• Unexpected change in temperature

Endothermic – heat is absorbed. (feels cooler)

Exothermic – heat is released. (feels hotter)

• Gas produced (bubbles appear, foaming)
• Odor produced (smells)
• A solid forms (precipate) when two liquids are mixed
• Electricity is generated
• Light is produced
• Fire is produced
Try it!
• http://www.gamequarium.org/dir/Gamequarium/Science/Physical_and_Chemical_Changes/