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STATES OF MATTER

STATES OF MATTER. DENSITY. Learning Points. Explain the different masses of materials with the same volume in terms of particle s pacing and relate this to density. Density. Take a look at the two boxes below. Each box has the same volume.

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STATES OF MATTER

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  1. STATES OF MATTER

  2. DENSITY

  3. Learning Points • Explain the different masses of materials with the same volume in terms of particle spacing and relate this to density.

  4. Density • Take a look at the two boxes below. Each box has the same volume. • If each ball has the same volume, which box would weigh more? Why? • The box that has more balls has more mass per unit of volume. • This property of matter is called DENSITY.

  5. Density Density is a measure of how many particles of a substance are in a given area/volume. • It can be worked out using the following equation. Density = mass (g)volume (cm3) • Solids are usually the most dense, followed by liquids and then gases.

  6. Density of Solids Solids have their particles closely packed together. In liquids the particles are further apart. With gases the particles are widely spaced apart from each other.

  7. Density of Solids Different solids have different densities. The steel ball is denser than the apple because it has MORE particles in the same volume.

  8. Float or sink gettyimages.com QUESTION Why is this person not sinking under the sea??? ANSWER She is less dense then the seawater and so does not sink.

  9. Remember Less dense substances float on more dense substances. More dense substances sink. Density = mass (g) volume (cm3)

  10. http://www.seed.slb.com/en/scictr/watch/bathroom/duck.htm Float or sink http://www.school-for-champions.com/SCIENCE/fluidfloating.htm

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