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States of Matter. 1. Develop a rule for each category . This rule should explain why each item is in that category. Hint : figure out what all items in a category have in common. Testers. 2. Write down each of the following and decide which category they would be in based on your rule.

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States of matter
States of Matter

1. Develop a rule for each category. This rule should explain why each item is in that category. Hint: figure out what all items in a category have in common.


Testers
Testers

2. Write down each of the following and decide which category they would be in based on your rule.

  • Bottled perfume

  • Marble

  • Coffee

  • Air

  • Concrete

  • Hydrogen


States of matter1
STATES OF MATTER

  • Matter can be classified into groups based on the shape and volume of their moving particles

    • SOLID

    • LIQUID

    • GAS

    • PLASMA


  • SOLID - state of matter when materials have definite shape anddefinite volume

    • Atoms are packed tightly together

    • Atoms are arranged neatly, orderly

    • Atoms vibrate around the same location


Examples of solids are
Examples of Solids are

  • Ice

  • Frog

  • Cheese

  • Bricks

  • Wood

  • Popcscle


  • Liquid- state of matter when materials have definite volume andindefinite shape

    • Liquid takes the same shape as its container

    • Particles FLOW past one another easily

    • Atoms are close, but not tight

    • Atoms are randomly arranged


Examples of liquids are
Examples of Liquids are

  • Orange Juice

  • Water

  • Soft drinks

  • Milk

  • Rubbing Alcohol

  • Vinegar


  • Gas – state of matter when materials have indefinite shape AND indefinite volume

    • Take shape and volume of container

    • Atoms spread to fit container

    • Atoms move rapidly, constantly

    • Atoms randomly arranged with large spaces between them


Examples of gases are
Examples of Gases are

  • Steam

  • Oxygen

  • Carbon dioxide

  • Smog

  • Tear Gas

  • Helium


  • Plasma – state of matter made up of small electrically charged particles

    • Found where there is high temperature and pressure

    • Rare to find on Earth

    • Ex, lightning

    • Used in fluorescent light bulbs and neon lights


Matter
MATTER

  • Kinetic Energy (KE) - energy of motion

  • Higher KE = Higher Temperature

    • All matter is made of millions of tiny particles

    • these particles are constantly moving, and have KE



Physical changes physical properties change but the substance is still the same
Physical Changes- physical properties change but the substance is still the same


Phase Change - reversible physical change from one state to another

  • heat energy is absorbed or released


Energy determines the state
Energy determines the state!


Add or subtract energy

When energy is added, particles move faster!

When energy is taken away, particles move slower!

Add or Subtract Energy. . .


  • Melting – changing from solid to liquid

    • When a solid gains heat

    • Temperature and energy INCREASE


  • Freezing –changing from liquid to solid

    • When a liquid loses heat

    • Baked cookies are actually FROZEN because they are solid.

    • Freezing does not always mean COLD.

    • Freezing point and melting point are the same temperature


  • Evaporation –changing from a liquid to a gas

    • Only liquid touching air evaporates

    • Temperature is below boiling point

    • Water VAPOR or STEAM = gas

    • More area = faster evaporation


  • Vaporization (boiling) – Change of liquid to a gas- when vapor pressure is the same as atmospheric pressure and bubbling occurs

    • Vapor pressure - pressure created by moving gas particles bumping into each other or the container

    • Atmospheric pressure – pressure outside the container


  • Condensation –change from gas to liquid

    • Water vapor particles hit a cool surface, lose heat, and change into water

  • Sublimation-change from solid to gas

    • NO LIQUID IN BETWEEN

    • Dry ice


Red = heating

Blue = cooling

Blahblah

blahblahbhla


Thermal expansion and contraction
Thermal Expansion and Contraction

  • Tendency of matter to expand or contract as a result of changes in temperature.

  • Typically: when heat is added, matter expands and when heat is removed matter contracts.

  • Expand: Get larger

  • Contract: Get smaller


Starter 11 7
Starter 11/7

  • Determine what characteristics the “Yes” examples share. Write a list.


Part 2
Part 2

  • Write down the following list and decide whether they are “Yes” or “No”

  • Sugar is used by the body to produce energy

  • Snow changes to water vapor

  • Sugar dissolves in water

  • Salt water evaporates to dryness

  • Wood burns in a campfire

  • “Crazy Glue” hardens when exposed to air


After reading was it a chemical change
After reading “Was it a Chemical Change”

  • Flip the paper over and answer these questions:

  • Summarize the article in 3 or more sentences

  • Create a list of the indicators (how you know) a chemical change occurred

  • What do you think catalysts are?Write where you got that information (the actual words)

  • Explain the difference between a chemical and physical change. How can you separate substances that have been chemically changed?



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