Mini-Lab #1 - Soda Squash

Mini-Lab #1 - Soda Squash

Soda Squash Mini-Lab

Procedure Part 1:

1. Place syringe tip in soda and draw up enough to fill barrel ½ way.

2. Plug syringe tip with cap.

3. Pull back on syringe plunger and observe.

Procedure Part 2:

1. Discard soda from part 1 into sink.

2. With cap off, draw air into syringe filling barrel about 1/3 with air only.

3. Place syringe tip into soda and fill remaining syringe barrel volume with soda.

4. Plug syringe tip with cap.

3. Press down on the plunger and observe.

Amazing Marshmallows (Boyle’s Law) Mini-Lab

Procedure Part 1:

1. Remove the plunger from the syringe

2. Place the 3 mini-marshmallows in the barrel of the syringe.

3. With the cap off the tip, push the syringe down as far as possible without squashing the marshmallows.

4. Cover the tip of the syringe with your finger.

5. Pull the syringe back and watch what happens to the marshmallows.

Amazing Marshmallows (Boyle’s Law) continued…

Procedure Part 2:

1. Remove your finger from plugging the tip.

2. Remove plunger but keep the marshmallows in the barrel.

3. Replace plunger into end of syringe barrel (do not push down toward marshmallows).

4. Place a finger on the syringe tip.

5. Press down on the plunger toward the marshmallows and watch what happens.

Pressure & Books Mini-Lab

Procedure:

  1. Lift the plunger of the syringe as high as it will move without going off scale. The volume inside the syringe will then be as large as possible.
  2. Seal the small opening of the syringe with a piece of clay. The seal must be airtight.
  3. Hold the syringe upright with the clay end on the table. With the help of a partner, place a single book on top of the plunger. Balance the book carefully so it does not fall.
  4. Read volume indicated by the plunger and record it in your data table. Repeat this with two, three, and four books.

Name: ______Class Per: ____

Mini-lab #1 - Soda Squash

Questions: Respond in complete sentences.

1. What happens to the bubbles when you pull back on the plunger as you did in Part 1?

______

2. What happens to the soda bubbles when you push down on the plunger as you did in Part 2?

______

3. Explain why this happens using the term “pressure”. Be sure to explain for Parts 1 & 2. (Hint: A complete response should be several sentences.) ______

______

______

Mini-lab #2 – Amazing Marshmallows (Boyle’s Law)

1. What happens to the marshmallow when you pull back on the plunger? Why does this

occur (explain using “pressure” in your response. ______

______

2. What happens to the marshmallow when you push down on the plunger? Why? (Explain using “pressure” in your response) ______

______

3. What does this indicate about the content of the marshmallow? ______

______

4. What is being compressed, the air or the marshmallow? ______

______

Mini-lab #3 – Effect of Pressure using books

1. Did the volume change between the addition of the first and second books? Explain why?______

2. What is happening to the gas particles in air that could explain this behavior?. ______

______.

Follow the directions below to begin today’s lab write up

--Heading--

Your namePage #

Pressure Mini-Labs(date)

(no lab partners)

Purpose: Do changes in pressure affect the behavior of substances?

Prediction: I think increases in pressure would ….. and decreases in pressure would ….. I think this because…..

Plan: (NOTE: Skip this – directions are listed at each lab station)

Observations: (NOTE: Your observations will be in the form of responses to the numbered questions below. Be sure to write a subheading to indicate which mini-lab # and name of that mini-lab station before numbering and responding to the questions listed below in the “observations” section of your notebook. You do NOT have to complete the stations in order but be sure to add a subheading so that it is clear which questions you are responding to for your observations!)

Soda Squash Mini-lab

1. What happens to the bubbles when you pull back on the plunger as you did in Part 1?

2. What happens to the soda bubbles when you push down on the plunger as you did in Part 2?

3. Explain why this happens using the term “pressure”. Be sure to explain for Parts 1 & 2. (Hint: A complete response should be several sentences.)

Amazing Marshmallows (Boyle’s Law) Mini-lab

1. What happens to the marshmallow when you pull back on the plunger? Why does this

occur (explain using “pressure” in your response.

2. What happens to the marshmallow when you push down on the plunger? Why? (Explain using “pressure” in your response)

3. What does this indicate about the content of the marshmallow?

4. What is being compressed, the air or the marshmallow?

Pressure & Books Mini-lab

1. What effect does pressure have on the books as you add more? Use evidence from your mini-lab experience to support your response.

2. What is happening to the gas particles in air that could explain this behavior.

--OVER--

Claims: (You can make at least one claim statement for each of the mini-labs above. Remember, a claims statement tells what you know to be true now based on evidence from your observations. Here are some ideas to get you started!)

ClaimsEvidence

Under low pressure marshmallows….Observations of marshmallows

Under high pressure marshmallows…under high and low pressure

Under high pressure Soda bubbles…. Observations of Soda bubbles under

Under low pressure Soda bubbles… high and low pressure

Water boils at ?? degrees C under regular Observation of hot water at low

room pressure pressure

At lower pressures the boiling point

of water…

Conclusion: (use your green “Power conclusion” sheet to guide you – remember you need to go back to the PURPOSE as the starting point. The observations you made in the mini-labs are just evidence (data) you’ll use to support your conclusion.)