• Y8_Density
  • anonym
  • 11.03.2021
  • Physik
  • 8, 9
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  • The Archimedes principle -
    Taking a bath to find the density of objects

    1
    Watch the video about Archimedes' bath. You find the link and some information on it in the box at the bottom of the sheet.
    • Write down what the king wanted Archimedes to find out and why.
    • Describe which physical quantity of the crown he had to determine and why.
    • Name the two quantities that Archimedes had to measure to find the density of the crown.
    2
    Now you: find out the density of objects in the PHET simulation. You will find the link in the second box below. There are three categories: intro, compare and mystery. Fill in the table for each category. You can find them on the next side.
    Video: How taking a bath led to Archimedes' principle - Mark Salata
    Archimedes was summoned by the king to investigate a suspicious goldsmith about his crown. Did the goldsmith mix silver into it?
    YouTube-Video
    PHET-simulation on density

    There are three categories that you can find below. Intro, compare
    and mystery. Fill in the according tables with the help of the
    simulation.


    Link: http://phet.colorado.edu/sims/html/density/latest/density_en.html

  • Part 1: Intro

    material

    density

    unit

    Does it float?

    styrofoam

    wood

    ice

    water

    brick

    aluminium

    custom (make up your own)

    Tab. 1 —
    Intro
    Look at the density of water and floating objects. Why can they float whilst others cannot?

    You can hold floating objects under the water with your mouse to measure their volume.

    Part 2: Compare

    same mass:
    ______ kg

    volume
    L

    density
    kg/L

    Does it float?

    blue

    yellow

    red

    green

    Tab. 2 —
    Compare

    Use the triangle from the slides to calculate density!

    same volume:
    ______ L

    mass
    kg

    density
    kg/L

    Does it float?

    blue

    yellow

    red

    green

    Tab. 3 —
    Compare
  • same density:
    ______ kg/L

    mass
    kg

    volume
    L

    Does it float?

    blue

    yellow

    red

    green

    Tab. 4 —
    Compare

    Part 3: Mystery

    There are three sets with 5 blocks of unknown material. Can you figure out what each block is made of?

    mass
    kg

    volume
    L

    density
    kg/L

    Does it float?

    material

    1A

    1B

    1C

    1D

    1E

    Tab. 5 —
    Mystery

    mass
    kg

    volume
    L

    density
    kg/L

    Does it float?

    material

    2A

    2B

    2C

    2D

    2E

    Tab. 6 —
    Mystery
  • mass
    kg

    volume
    L

    density
    kg/L

    Does it float?

    material

    3A

    3B

    3C

    3D

    3E

    Tab. 7 —
    Mystery