Your SlideShare is downloading. ×
Chemistry Unit 2 Part 1
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Chemistry Unit 2 Part 1

7,615
views

Published on

Published in: Technology, Education

0 Comments
7 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
7,615
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
592
Comments
0
Likes
7
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Matter and Change Part 1 – Properties of Matter
  • 2. TAKS student expectation
    • Integrated Physics and Chemistry (8) Science Concepts. The student knows that changes in matter affect everyday life . The student is expected to:
      • (A) distinguish between physical and chemical changes in matter such as oxidation, digestion, changes in states, and stages in the rock cycle; and
    • Here’s what you have to do if you want to pass this part of the TAKS:
    • Distinguish between physical and chemical properties.
  • 3.
    • Remember to duplicate
    Sample Question Source: Spring 2003 Exit TAKS
  • 4.
    • Characteristics of a substance can be classified as physical properties or chemical properties. Which of the following is a chemical property?
    • A Boils at 56ºC
    • B Tastes sour
    • C Has a density of 2.9 g/cm3
    • D Reacts with acid to produce hydrogen gas
    Sample Question Source: Reviewing Chemistry TAKS.
  • 5. Properties and Changes in Matter
    • Every substance has characteristic properties.
    • Chemists use these properties to distinguish between substances and separate them.
  • 6. Extensive vs. Intensive Properties Properties are either extensive or intensive .
    • Extensive Properties
    • depend on amount of matter present
    • volume, mass, and
    • amount of energy in a substance
    • Intensive Properties
    • do not depend on amount of matter present
    • melting point, density, ability to conduct electricity, and percent composition
  • 7. Properties of One Penny
    • Properties
    • Metal
    • Composed of 2.5% copper and 97.5% zinc
    • Mass – 2.50 grams
    • Volume – 0.442 mL
    • Density – 5.66 g/mL
  • 8. Properties of Many Pennies
    • Properties
    • Metal
    • Composed of 2.5% copper and 97.5% zinc
    • Mass – 2500 grams
    • (1000 pennies x 2.5 g)
    • Volume – 442 mL
    • (1000 pennies x.442mL)
    • Density – 5.66 g/mL
    One Thousand Pennies
  • 9. Extensive vs. Intensive Properties
    • WHICH PROPERTIES REMAINED THE SAME?
    • Metal
    • Percent Composition
    • Density
    • The intensive properties remained the same because they do not depend on the amount of pennies present.
  • 10. Extensive vs. Intensive Properties
    • WHICH PROPERTIES CHANGED?
    • Mass
    • Volume
    • The extensive properties changed because they do depend on the amount of pennies present.
  • 11. Property Types
    • There are 2 major categories that all properties of matter fall into
    Physical Chemical
  • 12. Physical Properties
    • Physical properties are characteristics that can be observed or measured without changing the identity of a substance.
    • They can be observed by using the five senses.
  • 13. Physical Properties
    • Cross between a lab and a poodle
    • Size of a lab
    • With the curly hair of a poodle
    • Can be black, yellow, brown, or white
    • Tail of a lab
    What are the physical properties of a labradoodle?
  • 14. Chemical Properties
    • Chemical properties relate to a substance’s ability to undergo changes that transform it into different substances.
  • 15. Examples of chemical properties:
    • Conductivity -ability to conduct electricity
    • Flammability – ability to ignite
    • Electronegativity – the ability to retain electrons
  • 16. Density – a Property of Matter
    • Density – a ratio that compares the mass of an object to its volume. The density of every pure substance in the world is unique.
  • 17. Calculating Density
    • The formula for calculating density is given on your TAKS formula chart, so you must know how to use it
  • 18. Sample Question Source: Grade 11 TAKS Information Book
  • 19. Sample Question Source: Spring 2003 Exit TAKS
  • 20. Sample Question Source: Spring 2003 Exit TAKS
  • 21. Sample Question Source: Spring 2003 Exit TAKS
  • 22. Sample Question Source: Spring 2003 Exit TAKS
  • 23. Sample Question Source: Spring 2003 Exit TAKS
  • 24. Sample Question Source: Spring 2003 Exit TAKS
  • 25.
    • Remember to duplicate
    Sample Question Source: Spring 2003 Exit TAKS
  • 26. Sample Question Source: Spring 2003 Exit TAKS
  • 27. Sample Question Source: Spring 2006 10th TAKS
  • 28. Sample Question Source: Spring 2006 10th TAKS
  • 29.  
  • 30. Part 2 – Changes in Matter
  • 31. Physical Change
    • A change in the physical appearance of a substance that does not change the identity of the substance.
    LIQUID SOLID GAS
  • 32. Physical Changes
    • Phase Change – physical change from one state to another
    LIQUID Between 0°C and 100 0°C SOLID Below 0°C GAS Above 100°C Only the temperature changes Still H 2 O in every form!!!
  • 33. Physical Changes
    • Examples of physical changes:
    • Crushing an aluminum can
    • Cutting your hair
    • Shredding paper
  • 34. Chemical Changes
    • Chemical changes, or chemical reactions, occur when one or more substances is converted into another substance.
    • Original atoms are preserved
    • New substances are formed
    • Different chemical composition than original substance
  • 35. Chemical Changes
    • Chemical changes are chemical reactions.
    • Indicated by a number of signs
    • formation of a gas,
    • formation of a solid, or precipitate
    • change in temperature
    • evolution of heat and light
    • Change in color
    • Change in odor
  • 36. Chemical Changes
    • When iron (Fe) rusts, you can see it happen over a long period of time.
    • The actual iron molecules change their structure as they react with oxygen and are oxidized.
  • 37. Chemical Changes
    • Examples of chemical changes:
    • Milk souring
    • Grass growing
    • Frying an egg
  • 38. Energy Transfer
    • All changes (physical and chemical) involve some transfer of energy.
    • Body uses energy from chemical reactions to digest food.
    • Weather involves a transfer of energy to evaporate water in the atmosphere.
    • Therefore, the study of matter also involves the study of energy.
  • 39. Summary
    • Extensive Properties
    • Intensive Properties
    • Physical Properties and Changes
    • Chemical Properties and Changes
    • Transfer of Energy

×