1. Penny Lab & pH Lab

2. NBpg 32: PENNY LAB
Include these words in your explanations: adhesion, cohesion, surface tension, volume, surface area
Question: How many drops of water can a penny hold with tap water and soapy water?
Predict # : Tap water ____ Soapy water ____
Hypothesis (If…then…)
Experiment:
Do 3 trials for tap and soapy water. Count how many droplets of water fit on a penny.
Data: Graph:
Create a graph based on the
data, and remember TAILS
Analyze: (2+ sentences)
Does tap or soapy water have more surface tension?
Conclusion:(+3 sentences)
Restate your Hypothesis, was it accepted or rejected.
Explain why, by summarizing the data.
Trial 1
Trial 2
Trial 3
Aver.
Tap
Soapy

3. pH Activity (Set-up) NBpg. 34 Draw pH Scale with labels 
Battery Acid
Gastric Acid
Vinegar
Soda
Acid Rain
Black Coffee
Urine/Saliva
Tap Water
Sea Water
Baking Soda
Tums
Ammonia
Soap
Bleach
Drain Cleaner
Draw pH Scale with labels 
Then place 5 substances into the 5 wells.
Match the numbers!
Use the Litmus Paper to find the pH and
determine the sample using the pH scale. 1. 2. 3. 4. 5.
Vinegar
Soda (sprite)
Tap water
Alkaline water/Baking soda
Bleach
Make an inference about each substance
Claim: (answer in a statement format)
Evidence: (scientific data)
Reasoning: (scientific explanation using vocab words)

4. Acid and Base Activity NBpg. 34 Draw pH Scale with labels
Battery Acid
Gastric Acid
Vinegar
Soda
Acid Rain
Black Coffee
Urine/Saliva
Tap Water
Sea Water
Baking Soda
Tums
Ammonia
Soap
Bleach
Drain Cleaner
Draw pH Scale with labels
Then place 5 substances into the 5 wells.
Match the numbers!
Use the Litmus Paper to find the pH and
determine the sample using the pH scale. 1. 2. 3. 4. 5.
Vinegar
Soda (sprite)
Tap water
Alkaline water/Baking soda
Bleach
Make an inference about your stomach:
is it an acid or alkali?
If you had an upset stomach, which of the 5 substances you tested would act as a buffer to calm your stomach?
Claim: (answer in a statement format)
Evidence: (scientific data)
Reasoning: (scientific explanation using vocab words)