Mr. Orth's Science classes Blog

Thursday, November 1, 2012

ES volumetrics 3* data

object

Accepted values

400ml pb/250ml gb/100ml gc

157 cm3

grp 1

grp 2

grp 3

grp 4

grp 5

grp 6

grp 7

grp 8

grp 9

159 cm3

140 cm3

160/175/155

180/150/157

180/150/152

160/150/153

165 cm3

180/175/155

160/150/158

160/150/159

180/150/158

160/150/156/

251 cm3

120/150/140

160/150/141

237 cm3

140/125/100

160/150/137

140/125/133/

160 cm3

260/250/252

280/275/246

280/250/247

260/250/253/

257 cm3

260/250/235

240/250/236

240/225/234

240/200/200

240/250/228

240/250/221/

249 cm3

160/175/158

180/150/161

160/150/160

160/150/130

180/150/162

160/175/156

160/150/153/

280/275/255

260/250/2583

260/250/258

280/250/284

260/250/252/

250/225/245

260/250/242

260/250/264

240/250/244

240/250/220

260/250/248/

relative error = accepted value - measured average

ES volumetrics class data 5*

object

Accepted values

400ml pb/250ml gb/100ml gc

157 cm3

grp 1

grp 2

grp 3

grp 4

grp 5

grp 6

grp 7

grp 8

grp 9

159 cm3

object

140 cm3

160/175/155

180/150/157

180/150/152

160/150/153

165 cm3

180/175/155

160/150/158

160/150/159

180/150/158

160/150/156/

251 cm3

120/150/140

160/150/141

237 cm3

140/125/100

160/150/137

140/125/133/

160 cm3

260/250/252

280/275/246

280/250/247

260/250/253/

257 cm3

260/250/235

240/250/236

240/225/234

240/200/200

240/250/228

240/250/221/

249 cm3

160/175/158

180/150/161

160/150/160

160/150/130

180/150/162

160/175/156

160/150/153/

280/275/255

260/250/2583

260/250/258

280/250/284

260/250/252/

250/225/245

260/250/242

260/250/264

240/250/244

240/250/220

260/250/248/

relative error = accepted value - measured average

for 400 ml plastic beaker

Ex #5: 251 - 260 = -9

ES volumetrics class data 1*

object

Accepted values

400ml pb/250ml gb/100ml gc

157 cm3

grp 1

159 cm3

140 cm3

160/150/157

160/125/152

140/154/154

165 cm3

160/150/157

160/150/159

251 cm3

140/150/140

140/125/134

140/150/142

160/175/174

237 cm3

140/150/125

120/125/134

160 cm3

260/300/300

240/250/255

260/250/252

257 cm3

240/225/238

240/250/232

249 cm3

160/150/165

160/175/162

160/150/160

260/250/255

260/250/257

260/250/255

240/250/248

260/275/245

260/225/242

240/250/247

240/250/145

relative error = accepted value - measured average

Earth science Volumetrics guide sheet

Volumetrics: practicing at measuring volume

Objectives:

Your group will use this handout as a guide, DO NOT WRITE ON IT.
In your Sci notebook copy down and respond to the following steps of the scientific method
You do not need to write procedures or diagrams; the experiment is simple as noted in the test
Improve your measuring skills; every group member should be responsible for measuring a container.
Other group members should be helping the “measuring member” to be accurate.
You must finish this “lab” today, use your time wisely, stay focused with your group and clean all spills. You have four members and three measuring devices, sometimes you may have to wait for other group members, everyone should be actively involved.

Question: Which of the measuring devices (400 mL plastic beaker, ______ mL glass beaker or a 100 mL G.C.) will be most accurate?

Hypothesis: Which device? and why?

Test: Carefully fill 4 of the provided containers with water then measure that unknown volume of water using each of the measuring devices. Then compare your results with the teacher’s.

Materials: 4 out of 9 #ed containers, water supply, paper towels, 400 mL plastic beaker, ______mL glass beaker and a 100 mL G.C.

Data Table: complete the data table and record your collected data

Device	Volume in mL for #___	Volume in mL for #___




Class Average for each device

Observations:

Analysis: Show work to calculate the averages

Conclusion: (Which device was most accurate? Describe how/why you know this. How do your numbers compare to the class? To the teachers? What errors might have occurred?)

Thursday, October 25, 2012

Eaarth Science - Volume of a drop

Instructions: DO NOT WRITE ON THIS HAND OUT! You and your tablemates will be practicing the steps of the scientific method, conducting an experiment and writing-up a lab.

· On a separate sheet of paper write the names of the members of your table that actively help with all parts of the mini-lab; this will be your lab write-up.

· Write out the question I gave you below, include the label Question:

· Write our Hypothesis: and then your educated guess to answer the question. Remember to discuss with your tablemates about how to make an educated guess then record the hypothesis on your lab write-up.

· Continue writing the label for each step (Q, H, T, M, P, D, A, & C) and following my hints for each step.

Question: How much space (volume) does a drop of water take up?

Hypothesis: What is your educated guess to answer the question? Compare 1 drop to 1 mL of water.

Materials: Every item used for data collection

Procedures: Step by step directions of your experiment that include diagrams that help illustrate your procedures

Data table: Have room to include ten trials, Yes, do the experiment ten times, make sure everyone in your group has an opportunity to collect data by doing the experiment.

Analysis: Show an example of how calculated the volume of a drop, in mL. Also show an example of how calculated the average volume of a drop, in mL, for the trials you did. Create a data table showing the average drop # for all other groups in the class.

Conclusion: Restate your hypothesis. Did you answer the question?

How do your results compare to the other tables? Explain.

How might error have occurred in your experiment? What affect might it have had? How can you redo your experiment to attain more accurate

results?

Bonus Points: if you finish both mini-labs early, you may earn bonus points for conducting a next step to this experiment. You are limited to the materials provided or on your person. You may also include a graph(s) of your data for e.c.