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Happy Monday!

Happy Monday! Please pick-up your name plate from the front table & put it on the corner of your desk. Have out your science composition notebook. How does the precision of the equipment affect the accuracy of the measurement when calculating density?.

bruce-murphy
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Happy Monday!

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  1. Happy Monday! Please pick-up your name plate from the front table & put it on the corner of your desk. Have out your science composition notebook.

  2. How does the precision of the equipment affect the accuracy of the measurement when calculating density?

  3. Density EquationDensity (D) = mass (m) volume (v)

  4. Using the equipment at your lab table find the density (g/cm3 or g/mL) of: - the block - the marble - water • While collecting data be thinking about: • the hypothesis • the procedure • the IV, DV, constants, etc.

  5. Design an experiment that answers the following question, and uses the data we collected in today’s lab…Howdoes the precision of the equipment affect the accuracy of the measurement when calculating density?

  6. The physical properties of a substance are the characteristics of a substance that can be used to describe it. There are two types of physical properties: Extensive Properties Intensive Properties Extensive properties are directly related to the size/amount of a sample. Intensive properties are NOT related to the size or amount of a sample.

  7. There are 3 primary extensive properties that are related to the size of a sample. Massis related to the amount of matter in a substance. A larger sample has more matter, so mass is an extensive property.

  8. Volume is the amount of space a sample occupies. A smaller sample would take up less space, so volume is an extensive property.

  9. Length is simply how long a sample is. (Width and height are also just lengths.) Length measures the size of a sample, so it is also an extensive property.

  10. There are also three secondary extensive properties that are directly related to the mass of a sample. 28.1 grams of silicon Approximately 1 mole of Si The number of molesof a sample is also a measurement of the amount of matter. We will learn to convert between grams and moles a little later in the year.

  11. Kinetic Energy Gravitational Potential Energy The amount of energyin a sample is directly related to its size. The amount of potential and kinetic energy of an object is directly related to the size and mass of that object.

  12. Silicon Water Sodium Chloride Atom Molecules Ions Thenumber of particles is also directly related to grams and moles of a sample. A larger sample has more mass which means more atoms, molecules or ions.

  13. MVL MEN Remembering this group of Super Heroes can help you remember the extensive properties! The Extender M V L M E N ass XXL olume ength oles Captain Extreme nergy Fighting crime one extensive property at a time! umber of particles

  14. Examples of INTENSIVE properties (not related to size): Magnetism Temperature/ Boiling Point/ Melting Point State of Matter Color

  15. What type of physical property is density?

  16. Density is an INTENSIVE property Mass = 8.75 g Volume = 6.50 cm3 Mass = 17.50 g Volume = 13.0 cm3 Mass = 35.0 g Volume = 26.0 cm3 Density = 1.35 g/cm3 Density = 1.35 g/cm3 Density = 1.35 g/cm3 Because it is the relationship between mass and volume, it is independent of both. That makes density anintensiveproperty.

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