Science (g7)

• Atomic models


  • Solid Sphere Model
  • Plum Pudding Model
  • Nuclear Model
  • Planetary Model
  • Quantum Model
• John Dalton

  1803
• J.J. Thomson


  1904
• Ernest Rutherford


  1911
• Niels Bohr


  1913
• Erwin Schrödinger


  1926
• Particle


  Smallest pieces of matter
• Solid


  • Firm and stable shape
  • Hard
  • Rigid
  • 3D shape
• Velocity


  The speed of something
• Temperature


  A measure of hotness or coldness of a body
• Liquid


  Has no fixed shape, particles free to flow
• Molecule


  Atoms or molecules that can interact with each other
• Force


  Push or pull on an object with mass that causes it to change velocity
• Solubility


  Ability of a substance to form a solution with another substance
• All substances have mass and take up space
• The first step to making an observation is to look at the object.
• 4 WEATHER PHENOMENA

  1. haze
  2. fog
  3. smog
  4. vog
• HAZE

  reduced visibility in the area due to extremely small dry particles that are suspended in the air
• FOG

  reduced visibility in the area due to very small water droplets that are suspended in the air
• SMOG

  reduced visibility in the area due to the complex of mixture of water droplets, air pollutant and other chemical suspended in the air
• VOG


  reduced visibility in the area due to the mixture of gas, particles and acidic droplets emmited by the volcano that are suspended in the air
• THE 4 WEATHER PHENOMENA

  HAZE- extremely small dry particles

  FOG- very small water droplets

  SMOG- complex mixture of water droplets, air pollutant and etc

  VOG- mixture of gas, particles and acidic droplets emmited by the volcano that are suspended in the air
• solution - homogenous mixture of 2 more substances, has a uniform composition. consist of a solute

  solute - the substance that is dissolved

  solvent - the substance that does the dissolving
• Solid Sphere Model - john dalton

  Plum Pudding Model - J.J thomson

  Nuclear Model - Earnest rutherford

  Planetary Model - Niels bohr

  Quantum Model- Erwin Schrodinger
• Solubility - ability of a substance to dissolve in a solvent

  Ratio- comparing the quantities of solute and solvent

  Agitation - process of stirring or shaking a substance to ensure its evenly mixed
• Saturated- solute and solvent have the same amount Unsaturated - there's more solvent than solute Super saturated - more solute than solvent
• Concentration - amount of substance present in a given quantity (grams, mL)
• Concentration - amount of substance present in a given quantity (grams, mL)

  Acids- Taste sour (lemon)

  Base- taste bitter or soapy (baking soda)

  Dilution - lowering concentration by adding more solvent to solute

  Dissolution - a solute dissolving in a solvent to form a solution
• John Dalton ( 1803 )

  J.J Thomson ( 1904 )

  Earnest rutherford ( 1911)

  Niels Bohr ( 1913 )

  Erwin Schrodinger ( 1926 )
• 1. Solid sphere model
  2. Plum pudding model
  3. Nuclear model
  4. Planetary model
  5. Quantum model

  
• Quantitative - numbers

  Qualitative - description
• Mixture- combination of 2 or more substances. Can be solid, liquid and gas

  Solution- homogeneous mixture of 2 or more substances

  Uniform - homogeneous mixture

  Filtration - seperating solid from liquid
• Who proposed the theory that everything in the world was made of tiny indestructible particles?

  Democritus
• What does the term "atomos" mean?

  Uncuttable
• According to Democritus, what determined the properties of materials?

  The type of atomos they were composed of
• How did Democritus describe the atoms of sour or sharp-tasting things?

  They were made of particles with pointy edges
• What was Aristotle's belief about the composition of everything on Earth?


  Everything was made of four elements: earth, fire, water, and air
• Who raised questions about atomic theory nearly 2000 years after Democritus?

  John Dalton
• Who found a discrepancy in Rutherford's atomic model?

  Niels Bohr
• How has our understanding of atomic structure evolved over the centuries?

  • From Democritus's idea of indivisible particles
  • To Dalton's solid sphere model
  • To Thompson's "plum pudding" model
  • To Rutherford's nuclear model
  • To Bohr's quantized orbits
  • To Schrödinger's quantum mechanical model