Investigative Science/Biology – Inquiry ice cream lab Tue_Wed 8/2_3/2016,

Perry High School

Mr. Fireng______

Nature of Science Investigation: How the Food Makers Captured Our Brains

Classroom discussion

  1. Observation from article:
  1. Question from article:
  1. Evidence from the article that mat help up answer the question:
  1. Tentative hypothesis (informal):
  1. How could this be tested?

Experimental Design:

  1. To complete this investigation, what are we going to be changing? (independent variable)
  1. After we change that variable, what are we going to be measuring? (dependent variable)
  1. What are our control variables (control variables):
  1. What are we going to compare the change to? (control group)
  1. Formal experimental question:

How does ______affect ______?

(independent variable) (dependent variable)

  1. Formal hypothesis:

If ______increases, then the ______will

(independent variable) (dependent variable)

______, because ______

(increase or decrease)

______.

Experimental procedures:

  1. Collect materials: 1 large plastic cup per group with 500 ml of melted vanilla ice cream, 1 small plastic cup per group member, 1 small plastic spoon per group member, 2 tablespoons of table salt per group (in a small plastic cup).
  2. Each group member will fill their small plastic cup with 50 ml of melted ice cream (about half full)
  3. Taste the ice cream and rate its texture, sweetness, saltiness and over-all-flavor. Each rating will be on a scale of 0 (lowest/poor) to 4 (highest/good). Record your data in table 2
  4. Repeat steps 4 and 5, adding a single pinch (approximately 3 ml) of salt to the melted ice cream. Record your data in table 2.
  5. Repeat steps 4 and 5, adding two small pinches of salt to the melted ice cream. Record your data in table 2.
  6. Repeat steps 4 and 5, adding three small pinches of salt to the melted ice cream. Record your data in table 2.
  7. Convert the date in table 2 into a bar graph. The amount of added salt is the independent variable and the ratings for texture, sweetness, saltiness and over-all-flavor are the dependant variables.
  8. Use the data collected as evidence to draw a conclusion on how salt changes the flavor of ice cream.

Table 2: rating ice cream samples (0 is the lowest score, 4 is the highest score)

Sample / Texture / Sweetness / Saltiness / Over-all-taste
no salt
one pinch of salt
two pinches of salt
three pinches of salt

Figure 1: ice cream rating based on added salt

****Use this as a guide for your conclusion, paragraph form, no personal pronouns

Describe the purpose of the investigation

  1. Restate the experimental question
  2. Restate the hypothesis
  3. Summarize the data
  4. explain if your hypothesis was supported by the data or was disproven
  5. explain what conclusion you can make on how texture, sweetness and saltiness effect the overall flavor of ice cream
  6. What were some potential errors & how could this experiment be improved?

Introduction:Summarize the classroom discussion. Why is this important?

Experimental Design:

Experimental question: ______

Hypothesis:______

Variables:

Independent variable:______

Dependent variable: ______

Five control variables:

  1. ______
  2. ______
  3. ______
  4. ______
  5. ______

Control group: ______

Experimental Procedures:

  1. Collect materials: 1 large plastic cup per group with 500 ml of melted vanilla ice cream, 1 small plastic cup per group member, 1 small plastic spoon per group member, 2 tablespoons of table salt per group (in a small plastic cup).
  2. Each group member will fill their small plastic cup with 50 ml of melted ice cream (about half full)
  3. Taste the ice cream and rate its texture, sweetness, saltiness and over-all-flavor. Each rating will be on a scale of 0 (lowest/poor) to 4 (highest/good). Record your data in table 2
  4. Repeat steps 4 and 5, adding a single pinch (approximately 3 ml) of salt to the melted ice cream. Record your data in table 2.
  5. Repeat steps 4 and 5, adding two small pinches of salt to the melted ice cream. Record your data in table 2.
  6. Repeat steps 4 and 5, adding three small pinches of salt to the melted ice cream. Record your data in table 2.
  7. Convert the date in table 2 into a bar graph. The amount of added salt is the independent variable and the ratings for texture, sweetness, saltiness and over-all-flavor are the dependent variables.
  8. Use the data collected as evidence to draw a conclusion on how salt changes the flavor of ice cream.

Results

Table 2: rating ice cream samples (0 is the lowest score, 4 is the highest score)

Sample / Texture / Sweetness / Saltiness / Over-all-taste
no salt
one pinch of salt
two pinches of salt
three pinches of salt

Conclusion: