Subject Areas:Chemistry, Measurement, physics Science, difficulty Solving, Reasoning and Proof, scientific research and an innovation
grade Level: 8 (7 – 9) Time Required: 45 minute group Size: 5 subject Areas:
|Physical scientific research|
|Reasoning and also Proof|
|science and modern technology|
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You are watching: Density lab worksheet
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eco-friendly Engineering and Water Chemistry introduction to environmental Engineering advent to Water Chemistry thickness & Miscibility
an introductionIn this very first part that a two-part lab activity, students use triple balance beams and also graduated cylinders to take it measurements and also calculate the densities of numerous common, irregularly shame objects with the purpose to deal with confusion around mass and also density. After ~ this activity, conduct the connected Density obelisk Lab - part 2 activity before presenting the linked Density & Miscibility lesson for discussion about concepts that describe what students have actually observed.
To monitor and also improve water high quality (if necessary), the is crucial to for ecological engineers to know all of the physical and chemical properties of the contaminants. Nature such as density and hydrophobicity should be thought about when identify the best way to remediate contaminated sites. Because that example, the differing densities and also immiscibilities the oil and also water prove useful to eco-friendly engineers when cleaning up oil spills.
After this activity, students need to be may be to:Explain the difference and relationship between mass and density.Take accurate measurements of mass and volume making use of a triple balance beam and reading a meniscus, respectively.
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Each group needs:4 marbles4 Popsicle or wooden craft stick piece (break wood sticks right into 1-inch pieces)4 crayon pieces (break crayons into 1-inch pieces)4 pasta noodles (dry, uncooked)triple balance beam100-ml i graduated cylindertap water
Worksheets and Attachments
Density obelisk Lab - part 1 Worksheet (pdf)
Density tower Lab - component 1 Worksheet (doc)
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Density pillar Lab - part 2
Concluding a two-part laboratory activity, students use triple balance beams and graduated cylinders to take it measurements and also calculate densities that several family liquids and compare them come the densities the irregularly shaped objects (as identified in part 1). Climate they develop density columns v the...
density Column rap - part 2
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So What Is the Density?
Students testimonial what lock know around the 20 major bones in the person body (names, shapes, functions, locations, as learned in the associated lesson) and also the ide of thickness (mass per unit of volume). Then student pairs calculation the densities for various bones indigenous a disarticulated human being skelet...
so What Is the Density?
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Floaters and Sinkers
Students are presented to the important concept of density. Students devise approaches to recognize the densities of heavy objects, consisting of the technique of water displacement to recognize volumes the irregularly-shaped objects.
Floaters and Sinkers
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Density & Miscibility
Through the thickness column lab activities, students watch liquids and solids of various densities communicate without an knowledge of why the result layers carry out not mix. This lesson provides students insight on some of the most fundamental chemical properties of water and also how the interacts v differ...
density & Miscibility
Have students finish the arrival to Water Chemistry lesson prior to conducting this activity.
Environmental engineers rely on a an excellent understanding the chemical and also physical nature of materials. We\"ve currently learned about measuring pH, which is one essential chemical property, specifically for environmental engineers who emphasis on water quality. What space some essential physical nature that eco-friendly engineers might also be concerned about? (Listen to student ideas. Possible answers: Weight, mass, area, volume, density.) We room going to focus on mass and density in today\"s activity.
Who can describe to me what density means? Or exactly how to calculate density? (Listen to student responses.) The thickness of an object is a measure up of the mass per volume. If we had actually an same volume, let\"s say enough to to fill this whole classroom, of feathers and of bowling balls, which would have more mass? (Answer: A room full of bowling balls.) Yes, a room complete of bowling balls would be more massive than a room complete of feathers, therefore this means that bowling balls have a greater thickness than feathers.
To calculation density, we must measure the fixed of an object and its volume. Then we division the fixed by the volume. This gives us the thickness of that object.
This is part 1 of a two-part lab activity. Friend will use a triple balance beam and a graduated cylinder to take measurements and also calculate the densities of numerous common, irregularly shame objects.
Note: The rap is expected to it is in inquiry-based, so the worksheet has no composed procedure.
Before the ActivityAt every lab station, place 4 or 5 of each of the four items (marbles, Popsicle rod pieces, crayon pieces, pasta noodles), as well as all of the other lab supplies.
With the StudentsDivide the class into teams of five students each.Hand the end the rap worksheets and have students file their thickness predictions.Measure the fixed of every item to acquire the average mass because that each ingredient of the thickness column. Begin with among the 4 items. Place all of the pieces of the specific item on the triple balance beam and also record the mass. Division the fixed by the variety of objects to acquire the average mass of each piece and record it in the data table.Next, fill the i graduated cylinder through an early volume of water (at least 50 ml). Record the early stage volume that water you chose. (As necessary, overview students on how to review the water level in the graduated cylinder; explain around the meniscus.)To uncover the mean volume of every of the 4 items, ar all the piece of the items in the graduated cylinder. Be certain the items space submerged. Record the ending volume. Execute a similar department calculation to attain the median volume of each piece.Repeat this process for all the remaining items.Use the data native the items (the average mass and also average volume) to calculate the thickness of every object. Create on the board: thickness = mass per unit volume.Have students prize the inquiries on their worksheets and also hand them in because that grading.Conclude by leading a wrap-up course discussion to to compare results and also conclusions; see inquiries in the assessment section.
density: Mass per unit volume.
mass: The lot of matter in a offered object.
meniscus: The convex or concave upper surface of a shaft of liquid. The curvature is brought about by surface ar tension.
volume: The lot of room an thing takes up.
Lesson Recap: have actually students comment on as a class the principles presented in the pre-requisite lesson.
Predictions: Direct students to the thickness Column lab – part 1 Worksheet, to rank the test items based on what they believe to it is in the most and also the least dense. Expect most students to use mass to do their assumptions.
Activity embedded Assessment
What\"s walking On? while students are performing the lab, go around and ask them inquiries to store them engaged and on task. Observe your lab measures to gauge their understanding of the material. Instance questions:Why do we measure up the volume this way as protest to together x W x H? (Answer: length x width x height, or l x W x H, is the volume equation for rectangular prisms. Nobody of the shapes of our check items are precisely that shape, therefore the results from doing that that way would be inaccurate.)How carry out we determine the mass and volume of among the objects? (Answer: The mass and volume the one object is identified as an typical of four samples of the object. We place all four of a particular object ~ above a range together to recognize a complete mass. Climate the full mass is divided by 4 to calculate the average mass of among that certain object. The median volume is established in the same method except the items are placed in the i graduated cylinder that water and the total volume is determined by the water displacement.)What is the density of water? (Answer: 1,000 kg/m3 or 1 g/ml or around 8.3 lbs every gallon.)
Worksheet: Have students price the worksheet questions and also hand lock in because that grading (see answers in the Wrap-Up Discussion, below). Evaluation their answers to gauge their understanding of the material.
Wrap-Up: At lab end, bring students together as a class and also ask the adhering to questions. Make sure everyone understands the answers:Rank the complying with items based on their calculation densities, with 1 gift the the very least dense and 4 gift the many dense. (Answer: The ranking is: 1 = Popsicle stick, 2 = pasta, 3 = crayon, 4 = marble.)Were her predictions correct? What did girlfriend learn around mass and density? (Answers will certainly vary, depending upon students\" predictions. Expect them to point out that mass can be measured straight using a range or balance, while density is calculated using an object\"s mass and volume. Mean them to define that the density of an item is a measure of the lot of mass every unit volume of an object.)
If the marbles roll off the balance beam, location them in a container and then measure the massive of the north container alone in stimulate to recognize the massive of the marbles.
The Popsicle stick pieces may need to it is in submerged to get an ext accurate volume readings due to the fact that they space less thick than water. Make sure students carry out not location their finger in the water when taking measurements.
Remember to measure up the fixed of the items prior to measuring the volume since wet items sweet more.
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Next, command the linked Density tower Lab - component 2 task as the second component of this activity. Component 2 concentrates on the densities of various liquids that carry out not mix together.