TitelY8_Density
Autoranonym
veröffentlicht11.03.2021
FachPhysik
Klassenstufen8, 9

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The Archimedes principle -
Taking a bath to find the density of objects

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.

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

Link: https://youtu.be/ijj58xD5fDI

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

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)

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

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

Compare

same density: ______ kg/L	mass kg	volume L	Does it float?
blue
yellow
red
green

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

Mystery

	mass kg	volume L	density kg/L	Does it float?	material
2A
2B
2C
2D
2E

Mystery

	mass kg	volume L	density kg/L	Does it float?	material
3A
3B
3C
3D
3E

Mystery

The Archimedes principle -Taking a bath to find the density of objects

Part 1: Intro

Part 2: Compare

Part 3: Mystery

The Archimedes principle -
Taking a bath to find the density of objects