understand density

User Generated

unznyfuruev

Science

Physics 1

Rose valley secondary school

Description

Using the following simulation, understand density by creating an experiment

https://phet.colorado.edu/sims/density-and-buoyancy/density_en.html

Using the following simulation, understand density by creating an experiment

https://phet.colorado.edu/sims/density-and-buoyancy/density_en.html

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Student Directions Density: How Does Density Relate to Mass &Volume and an Objects Interaction with Water? Version B includes real equipment http://phet.colorado.edu Learning Goals: Students will be able to use macroscopic evidence to: 1. Measure the volume of an object by observing the amount of fluid it displaces or can displace. 2. Provide evidence and reasoning for how objects of similar: a. mass can have differing volume b. volume can have differing mass. 3. Identify the unknown materials by calculating density using displacement of fluid techniques and reference tables provided in the simulation. Directions: 1. Explain how you use the simulation to measure the volume that an object can displace. Also: a. What is similar or different from the volume that the blocks displace naturally? How might a scientist explain the behavior? b. Explain why you think the blue block on the “Same Mass” setting can be placed anywhere in the water. 2. Design experiments to demonstrate the learning goal #2. Provide tables for evidence and use specific examples from your data to provide the reasoning. 3. Design an experiment to identify the 5 Mystery blocks using the Table in the simulation. a. Write your procedure in paragraph form. b. Identify each block using specific evidence to support your conclusions. 4. Design an experiment and data table to find the density of a real object. a. Do several trials, calculating density for each trial. b. Calculate the deviation for each trial from the average like you did in the Precision and Accuracy Lab. (hint: find the absolute value of (observed density – average density). c. Does your data show precision? Explain d. Does your data show accuracy? Explain 5. 11/13/2019 Loeblein http://phet.colorado.edu
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Explanation & Answer

Hello, this is my rough draft for the answers that you need. If you have any clarifications or corrections, just tell me so I can update the answer. If none, this will be the final answer. Thank you! 😀

Directions:
1. Explain how you use the simulation to measure the volume that an object can displace.
Answer:
First, we examine a block of wood with a mass of 2 kilograms as shown in Fig. 1.1.

Fig. 1.1. Set-up of 2kg block of wood and 100L water
Immersing the block of wood into the 100L water pond, we can see in the simulator that the
water volume increased by 2 liters as shown in Fig 1.2.

Fig. 1.2. Measuring the volume of the block of wood.
Now, we try another block of wood with a mass of 4 kg. Immersing the block into the
same 100L water, we can see that the volume of the water increased by 4 liters as shown in Fig.
1.3.

Fig. 1.3. Measuring the volume of the block of wood.
Therefore, we can conclude that the volume of the first block of wood is 2 liters and the
volume of the second block of wood is 4 liters which is the difference between the original volume
of the water without the blocks of wood and the volume of the water after immersing each blocks
of wood.
Also:
a. What is similar or different from the volume that the blocks displace
naturally? How might a scientist explain the behavior?
Answer:
The volume that the two blocks displaced naturally simply indicates the volume of each
block. This means that the 2kg block that displaced 2 liters of water has a volume of 2 liters and
the 4kg block has a volume of 4 liters.
...


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