Quest 1: Density

Q1P1: Self Assess

1. Get the Chemistry Learning Target Page from the front table. (It looks like this)
2. Read the skills and the bullet points associated with them. Then, self assess using S, M, P, and L.
3. Remember to self assess on the FRONT and BACK of the page.
4. Clip the paper in your binder so you don't lose it!

Show Mrs. Roehm your Learning Target Page and tell her the target you already know the most about and the target you are most excited to learn about.

Q1P2: Density Discourse

1. Read this density resource/notes page. While reading try to find the answers to the questions below. You don't have to write the answers down. Just know Mrs. Roehm will be asking you those questions when you check in.

- What is density?

- How do you calculate density?

- If I gave you a toothpick, how would you calculate the density of the toothpick? (How would you find the mass? How would you find the volume?)

2. Write a discourse based on the Density Resource/notes page from step 1 in your Density Discourse Spreadsheet in Google Classroom. You can find your Density Discourse Spreadsheet under the Chemistry Quest 1 heading in Google Classroom. There are also resources attached in the assignment that can help you if you need help. In addition, there are some tips below to help you write a discourse!

Follow the PRIM Method!

Here is an example of the discourse we wrote together as a class:

Show Mrs. Roehm your discourse and she will ask you the questions to get a signature.

Chemistry Self Pacing Powerpoint 2025.jpg

Q1P3: Make a Plan

Your challenge is to make water stack on top of itself (see the picture on the board to get a visual).

Each layer must be a different color and you are required to make 3 layers. You must also calculate the density of each layer.

Here are your materials: salt, water, beakers, test tube, ring stand, eyedropper, scale, food coloring

Come up with a plan for how you will accomplish this task.

Here are some things that must be considered:

How much water is in each beaker?
How much salt is in each beaker?
What color is in each beaker?
How much of the liquid do you put in at a time?
How do you find the volume of each layer?
How do you find the mass of each layer?
How do you find the density of each layer?
Which order (of colors) will you put in the test tube?

Go tell Mrs. Roehm your plan. (You don't have to write the plan down, but you can) DO NOT START UNTIL YOU GET APPROVAL.

Q1P4: Super Secret Tips For Success

1. Read these Super Secret Tips for Success. (Click the underlined sentence. It's a link.) Read the tips CAREFULLY! Ask Mrs. Roehm if you are unsure of any of the tips.
2. Get a data table page from Mrs. Roehm for your density calculations (It looks like this). You must calculate the density of each layer of your Density Column.
3. Then, make your test tube challenge!
4. Show Mrs. Roehm your stacked water AND your completed data table page for XP.

Q1P5: Models of Atoms

1. Go to Google Classroom and complete the assignment named Q1P5: Models of Atoms. The directions are located within the document.

Show Mrs. Roehm your completed assignment for a signature.

Q1P6: Will it sink or float?

Procedure: Go to the station for the lab.

The white red bucket should be filled water. If the water isn't warm, dump it out and fill it with warm water from the sink. Squeegee any spilled water.

1. Place the Coke can and Diet Coke Can and hold them in the bucket filled with water so that they are both on the bottom (Don't open the cans.).

2. Let go of both cans at the same time. Which one rises fastest ?

3. REMOVE THE CANS FROM THE BUCKET.

If you are absent, you can watch this video of the lab.

4. After completing the lab: Have a student led discussion with your group that answers these questions: Student Led Discussion Rubric (Click the link to see your requirements for any scientific discussion)
***If you are absent, just email me the answers to these questions.

Here is a text you can use as your text reference.

Discussion Questions:

Which is more dense Coke or Diet Coke?
What evidence from the lab do you have to support this?
Why is one can more dense than the other? (Talk about ALL variables - mass, volume, and density)
What is different about the composition of Coke and Diet Coke that makes them different?
Every member of your group should talk!
If you are absent, you can email me the answers to these questions.

5. Then, write a Discourse about this lab and density in your Daily Discourse Spreadsheet (You may have to unsubmit your Q1P2 assignment to do this): This idea must connect to a bullet point under a Crosscutting Concept. Write your idea or question on your Daily Discourse page. Be sure to include all of the information on the page including the CCC and Bullet Point you are connecting to. You must use a different CCC for each station.

Show Mrs. Roehm your Discourse. In addition, she is going to ask you to tell her what your group discussed during the discussion. Be ready to share!

Q1P7: Is salt water more or less dense than pure water?

Procedure:

1. Place the broken yellow plastic paper clip in the beaker of plain water.

2. Observe if it sinks or floats.

3. Stir the salt water. Place the paper clip in the beaker of salt water. Observe if it sinks or floats.

If you are absent, watch this video of the lab.

4. After completing the lab, have a student led discussion with your group that answers these questions:

Here is a text you can use as your text reference.

Which is more dense Water or Salt Water? (Talk about all 3 variables - mass volume and density)
What evidence do you have from the lab that proves this?
If you had 1000 ml of each liquid, which would have more mass?
Every member of your group should talk!
If you are absent you can email me the answers to the questions

5. Then, write a Discourse about this lab and density in your Daily Discourse Spreadsheet: This idea must connect to a bullet point under a Crosscutting Concept. Write your idea or question on your Daily Discourse page. Be sure to include all of the information on the page including the CCC and Bullet Point you are connecting to. You must use a different CCC for each station.

Show Mrs. Roehm your discourse. In addition, she is going to ask you to tell her what your group discussed during the discussion. Be ready to share!

Q1P8: Cartesian Divers

Procedure:

1. Look inside the 2 liter. There is an eyedropper in there. :)

2. Squeeze the sides of the bottle until the eyedropper sinks to the bottom.

3. Try to keep the eyedropper suspended in the middle of the bottle by applying different amounts of pressure on the bottle with your hands.

If you are absent, watch this video of the lab.

4. After completing the lab, have a student led discussion with your group that answers these questions:

Here is a text you can use as your text reference.

Why did the eye dropper sink? What happened inside the eyedropper that caused this?
When you squeezed the bottle, did the volume of the eye dropper change?
When you squeezed the bottle, did the mass of the eye dropper change?
When the bottle was squeezed, did the eyedropper become more or less dense? (Talk about all 3 variables - mass volume and density)
What evidence do you have from the lab that proves this?
When the eye dropper was floating in the middle, what does that say about the density?
Every member of your group should talk!
If you are absent, you can email me the answers to the questions.

Show Mrs. Roehm your discourse. In addition, she is going to ask you to tell her what your group discussed during the discussion. Be ready to share!

Q1P9: Ball and Ring Apparatus

WARNING: ASSUME ALL MATERIALS AT THIS STATION ARE EXTREMELY HOT!

Procedure:

1. Put on goggles.

2. Take the ball and ring and push the ball through the ring to see if it can pass through. (Hint: It should. Use the strategy Mrs. Roehm explained in class.)

3. Heat the ball over a Bunsen burner for 2 minutes.

4. Try again to push the ball through the ring.

5. Put the ball immediately in the bucket of ice water for 1 minute.

6. Try again to push the ball through the ring.

If you are absent, watch this video.

7. Have a discussion with your group that answers the questions below. Looking for a text to cite as evidence? Here is a Density Text Resource. You also have this page CH.4 Notes Page you can use as a reference (Use the 2nd page of the document).

Did the mass of the ball change when it was heated? How do you know?
Did the volume of the ball change when it was heated? How do you know?
Changes in Density:
Did the density of the ball change when it was heated?
If so, did its density increase or decrease?
Explain why the density changed by referring to the definition of density.
Explain why the density changed by referring to the density formula. Give an example of how you know. (In other words, make up your own numbers to show it works.)
What evidence did this lab provide to prove how temperature affects the molecular arrangement and physical properties of molecules?
If you are absent - you can email me the answers to the questions.

You don't have to write a discourse for this station.

Go see Mrs. Roehm. She is going to ask you the questions above. Make sure your group discusses these BEFORE going to see Mrs. Roehm. Be ready to share!

Q1P10: Density of Solids

Procedure:

1. On a piece of paper, write the headings listed below.
Object:______________
Mass (g):______________
Volume (cm3):__________
Density (g/cm3):________

2. Choose one rectangular prism (like a tissue box, a sticky note pad, or a box of any kind) to measure the density of.

3. Write the name of the object on your paper.

4. Place the object on the scale. Record the mass on your paper.

5. Using a ruler, measure the length, width, and height of the object. Multiply the length x width x height. This is the volume. Record the volume on your paper.

6. Calculate the density. (Mass divided by volume)

**Don't forget all measurements should have units on your paper!

7. On the same piece of paper, write the headings listed below.
Tiny Tube Color:____________
Mass of Tiny Tube:_____________
Original Volume of liquid:_____________
Volume of liquid with Tiny Tube:___________
Volume of Tiny Tube:____________________
Density of Tiny Tube:____________________

8. Pick one "Tiny Tube" to measure through displacement.

9. Write the color of the "Tiny Tube" you have chosen on your paper.

10. Using the scale, weigh the object you have chosen and record the mass on your paper.

11. Fill the graduated cylinder with water. The amount is your choice. Record this data next to "Original Volume of liquid". Remember to measure from the meniscus!

12. Place the object into the graduated cylinder of water. Record the new volume of the liquid next to the heading, "Volume of liquid with object". Remember to measure from the meniscus!

13. Subtract the new volume from the previous volume to find the displacement. (New Volume) - (Old Volume) = Volume of object.

14. Write the difference next to "Volume of object".

15. Divide the mass by the volume and record the density.

Show Mrs. Roehm your calculations for XP. Make sure you have units next to all of your measurements and calculations!

Q1P11: Density of Water

1. On the same piece of paper you have been recording your data for the last station, add these headings as you calculate the density of water.

Mass of empty graduated cylinder:_______________
Mass of graduated cylinder with water:____________
Mass of water:_____________________
Volume of water:___________________
Density of water:___________________

2. Measure the mass of an empty graduated cylinder. Record this data.

3. Pour in an amount of water. (YOUR CHOICE). This is the volume. Record this data. Remember to measure from the meniscus!

4. Place the graduated cylinder with the water on the scale and measure its mass. Record this data.

5. Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with water. This is the mass of the water. Record this data.

6. Calculate the density. (Mass divided by volume)
7. For the next part, you will need to write the same headings again.
Mass of empty graduated cylinder:_______________
Mass of graduated cylinder with water:____________
Mass of water:_____________________
Volume of water:___________________
Density of water:___________________

8. Repeat the procedure using a different volume of water. The amount is your choice, but make sure the number (the volume) is significantly different than your original number.

9. Make sure all of your data has units!

Have a discussion with your group about the following scenario: A student generated the question, "How does the volume of water affect its density?" Based on your mathematical computations, what is your answer to that question? (YOU DO NOT HAVE TO WRITE YOUR ANSWER!)

Show Mrs. Roehm your calculations. She will be asking you what your group discussed to answer the question above.