page 16 tues-wed august 02-03, 2016 · lab prep 2. label paper cups a. “control” b. sample a c....

4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test

Learning goal: Use data to write and evaluate a hypothesis

while using the scientific process.

Better Worse No difference

# of responses

Table 1: Pre-Test Class survey.

“Will adding salt to ice cream make it more enticing/addicting?”

Copy and complete the hypothesis below.

Hypothesis:

6Tues-Wed August 02-03, 2016

Warm up: Why do we overeat? Author blames fat, sugar, salt”, a news story

from NPR is research for the investigation. The article can be found at

http://www.npr.org/templates/story/story.php?storyId=103862714

http://www.npr.org/templates/story/story.php?storyId=103862714



4Design,

complete, valid

conclusion

3Design & complete

2Know steps, follow

directions

1Know the

steps

Learning goal: Use data to write and evaluate a hypothesis while using the

scientific process.

Learning scale:

Student’s self-evaluation: Complete at home or at the end of class, use the

4-3-2-1-0 system of understanding

Student’s self-evaluation: Complete at home or at the end of class, use the

4-3-2-1 Learning scale (two to three sentences).

Homework: none.

1 2 3 4

Name the steps Name the steps and follow

directions in an investigation

Can design and conduct an

investigation leading to a conclusion

Design and carry out an investigation

leading to a valid and rational conclusion

Page 16Tues-Wed August 02-03, 2016

Lab prep

1. Collect dry materials

a. Triple beam balance

b. One 500 ml red plastic cup

c. Four 80 ml white paper cups per group member

d. Small amount of salt

e. One plastic spoon per group member plus one additional plastic spoon

Learning goal: Know how current knowledge compares with

the expectations of this course and estimate the work

load needed to succeed.

4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


Lab prep

2. Label paper cups

a. “Control”

b. Sample A

c. Sample B

d. Sample C

3. Mark a “fill line” ¼ up from the bottom of the cup




4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


control A B C

Lab prep

4. Calibrate Plastic cup on the balance

a. Find the mass

b. Approximately 11.7 g

c. Exact mass might be different

d. Make sure cup is “balanced”




4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


Lab prep

5. Measure 250 g of ice cream

a. Increase the counter balance mass by 250 g on the right

b. Add 250 g of vanilla ice cream to rebalance the cup

c. Remove cup from balance and stir ice cream till smooth




4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


Increase mass

by 250 g on

the right.

Carefully add

ice cream to

the cup till it

rebalances.

The amount of

ice cream will

be equal to

250 g

Lab prep

6. Fill all “Control” paper cups to fill line with ice cream from the plastic cup

a. Do not over fill!

b. Groups will not receive extra ice cream




4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


control

Lab prep

7. Add 0.20 g of salt to the ice cream

a. Rebalance the cup with ice cream

b. Increase the counter balance mass by 0.20 g on the right

c. Add 0.20 g of salt to the ice cream to rebalance the cup

d. Remove cup from balance and stir ice cream till smooth




4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


Increase mass

by 0.20 g on

the right.

Carefully add

SMALL amounts

of salt to the cup

till it rebalances.

The amount of

ice cream will be

equal to 0.20 g

Lab prep

8. Fill all “Sample A” paper cups to fill line with ice cream from the plastic cup






4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


A

Lab prep









4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


Increase mass

by 0.20 g on

the right.

Carefully add

SMALL amounts

of salt to the cup

till it rebalances.

The amount of

ice cream will be

equal to 0.20 g

Lab prep

10. Fill all “Sample B” paper cups to fill line with ice cream from the plastic cup






4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


B

Lab prep









4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


Increase mass

by 0.20 g on

the right.

Carefully add

SMALL amounts

of salt to the cup

till it rebalances.

The amount of

ice cream will be

equal to 0.20 g

Lab prep

12. Fill all “Sample C” paper cups to fill line with ice cream from the plastic cup






4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test


C

Data Collection: Using a spoon, each student should stir and taste the samples. After tasting, rank

each sample between 1 and 4. “1” indicates the best sample and “4” indicates the worst sample.

Each student will fill in a personal “Experimental Rank” and indicate this score in the “Class Rank”

Column. Class Ranks totals will be used to find the normal, or average, rank.




4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test

Cup ExperimentalRank (1-4)

ClassRank

Normal/Average Rank

Control

Total=____

A

Total=____

B

Total=____

C

Total=____

Table 2: Experimental and Normal Rankings


4Contrast

application

3Contrast

differences

2Identify

new content

1Complete pre test



Create a comparison graph of the control

and samples A, B, and C using the

Experimental Rank as the Independent

Variable and the Normal Rank as the

Dependent Variable.

Cup ExperimentalRank (1-4)

ClassRank

Normal/Average Rank

Control

A

B

C


page 16 tues-wed august 02-03, 2016 · lab prep 2. label paper cups a. “control” b. sample a c....

Documents