1. 1/21/15 Objectives
Content Objective: Analyze a graph to identify trends or patterns in experimental data.
Language Objective: Write the Analysis and Discussion sections of your lab report.

2. Entry Task: Lab Notebook 1/21/15
In your lab notebook, create and fill in the following T-chart:
Possible source of experimental error
Possible effect of experimental error on results 1. 2. 3. 1. 2. 3.

3. Experimental Error Partner Share:
Partner A: Share one T-chart entry out loud
Partner B: Write down entry in lab notebook
Switch
Be prepared to share out with the class

4. Experimental Error - Period 1
Possible Source
Inaccurate water measurement
Relocating bag from window to wall
3. Opening cabinet allowed seeds in “24hr darkeness” to receive light
Possible Effect
Uncontrolled experiment, some seeds received more water than others
Change in temperature during experiment could have affected seed germination
Enhanced germination or activated photosynthesis

5. Experimental Error - Period 2
Possible Source
Too much water
Too little water
Bag not sealed at all
Bag completely sealed
Temperature in the room
Seed-to-water ratio
Possible Effect
Seeds might drown
Seeds might not germinate
Paper towel dried out
Not enough oxygen for seeds to germinate
Some seeds require temperatures warmer than the room

6. Experimental Error - Period 3
Possible Source
Film on windows
Dark environment not constant
Amount of water
Amount of air in the bag
Bags completely sealed
Bags too open
Possible Effect
Less sunlight on seeds and plants
Could affect germination, plants might start doing photosynthesis
Seed germination
Not enough oxygen
Paper towel dried out

7. Experimental Error - Period 4
Possible Source
Water measured incorrectly
Too many seeds
Distance from heat lamp
Bags sealed completely
Bags completely unsealed
Possible Effect
Seeds were too dry to germinate
Not enough nutrients
Inconsistent seed temperature
Not enough oxygen to germinate
Paper towel will dry out

8. Experimental Error - Period 5
Possible Source
Bag sealed
Mixing up seed groups
Too much water
Incorrect measurement units
Moving seeds from window to the wall
Seeds covered with tape
Window film
Possible Effect
Lack of oxygen which prevents germination
Inconsistent results because of new growth conditions
Seeds drown
Incorrect graph scale
Temperature change affected germination
Sunlight variability

9. Analysis The Results section of your lab report will have three parts:
Data Table(s)
Graph(s)
Analysis of Graph(s)
With your lab parnter(s), take turns sharing what you notice about your graphed experimental data. Record observations in your lab notebook.

10. Analysis
When we analyze data, we seek to, “discover or reveal (something) through detailed examination.”
With your lab parnter(s), take turns sharing what you notice about your graphed experimental data. Record all observations in your lab notebook. Focus on trends or patterns in the data. In paragraph form, these observations will become your Analysis section.

11. Discussion Section
Explain how your results supported / disproved your Hypothesis.
Discuss at least three possible sources of error and how those errors may have impacted your results.
Explain relevant next experiment to extend learning about your Research Question.

12. Homework
Finish writing the Analysis and Discussion sections of your lab report in paragraph form.
Be prepared to finish typing your lab report tomorrow. We will meet in the computer lab in room 235.