Student Work / Unit Lesson # 3
Investigating the Effect of Different Drinks on Teeth
Name: / Period ______/ Date :Laboratory Experience 3 / Worth 130 Lab Minutes
Bridge
Going to the dentist is an important part of staying healthy. In order to keep your teeth healthy, it is recommended that you brush your teeth at least twice a day if you cannot brush after every meal. One of the things that the dentist will tell you is to stay away from drinking too much soda or other sugary drinks so that you don’t damage your teeth.
What do you think is in the soda that is doing the damage? / Objective:
Behave as a scientist to determine what is in popular drinks that is damaging teeth across America.
Mini Lesson
If you notice in the bridge, the dentist says other sugary drinks not just soda. Do you think it is the sugar that is doing the damage or something else?
Investigate some of the ingredients in common sugary drinks that many people enjoy today. Compare the ingredients in these drinks and see what else they have in common. Record your findings on the next page.
Soda (such as Pepsi or Mountain Dew):
Apple Juice:
Sports Drinks (such as Gatorade or Powerade):
Coffee: / Essential Question:
How can I behave as a scientist to determine what is causing tooth damage in popular drink choices?
Work Period
In your lab groups, design an experiment in which you can identify what is in or what is happening that is doing the damage to teeth with relation to these “sugary drinks.”
Title of Lab: ______
Exploration
Question
Identify your Variables
Independent Variable:
Dependent Variable:
Prediction/Hypothesis
Experimental Design
Materials:
Procedure:
Data Collection
Data Analysis
Evaluation
Summary
Since you will need a couple of days before you will see any results, explain the type of data that you should find if your hypothesis is correct. Use the space below.
Closing
Do you think that sugary foods have the same effect as the drinks that you are testing? Why or why not?
Lesson 3. Sugary Drinks, Independent Practice 1
1. A student hypothesized that lettuce seeds would not sprout (germinate) unless they were exposed to darkness. The student planted 10 lettuce seeds under a layer of soil and scattered 10 lettuce seeds on top of the soil. The data collected are shown in the table below.
One way to improve the validity of these results would be to
(1) conclude that darkness is necessary for lettuce seed germination
(2) conclude that light is necessary for lettuce seed germination
(3) revise the hypothesis
(4) repeat the experiment
2. A television advertisement claims that a certain brand of cough drop reduces coughing for 8 hours. Describe an investigation that could be used to determine if this claim is valid. In your answer, include at least a description of:
• the treatment to be given to the experimental group [1]
• the treatment to be given to the control group [1]
• the data to be collected [1]
• when the data should be collected [1]
• one observation that would lead to the conclusion that the claim is valid [1]
Name: / Period ______/ Date :
Name: / Period ______/ Date :
Lesson 3. Sugary Drinks, Independent Practice 2
1. What is the volume of the liquid in the graduated cylinder shown below?
(1) 23 mL (3) 27 mL
(2) 26 mL (4) 28 mL
2. Information concerning the diet of crocodiles of different sizes is contained in the table below.
Which statement is not a valid conclusion based on the data?
(1) Overharvesting of fish could have a negative impact on group C.
(2) The smaller the crocodile is, the larger the prey.
(3) Group B has no preference between reptiles and birds.
(4) Spraying insecticides would have the most direct impact on group A.
Name: / Period ______/ Date :
Lesson 3. Sugary Drinks, Independent Practice 3
You have been assigned to design an experiment to determine the effects of light on the growth of tomato plants. In your experimental design be sure to:
• state one hypothesis to be tested [1]
• identify the independent variable in the experiment [1]
• describe the type of data to be collected [1]
Name: / Period ______/ Date :
Lesson 3. Sugary Drinks, Independent Practice 4
The diagram below illustrates the result of growing a garlic bulb in a cup of distilled water over five days.
Design an experiment consisting of a control and three different experimental groups to test the prediction, “Garlic grows better as the salt concentration of the solution in which it is grown increases.” In your answer, be sure to:
• describe the control to be used in the experiment [1]
• describe the difference between the three experimental groups [1]
• state one type of measurement that should be made to determine if the prediction is accurate [1]
• describe one example of experimental results that would support the prediction [1]
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Name: / Period ______/ Date :
Lesson 3. Sugary Drinks, Independent Practice 5
The drugs usually used to treat high blood pressure do not affect blood vessels in the lungs. Bosentan is a new drug being studied as a treatment for high blood pressure in the lungs. In an experiment, patients treated with bosentan showed an improvement in the distance they could walk without fatigue within 12 weeks.
Design an experiment to test the effectiveness of bosentan as a drug to treat high blood pressure in the lungs. In your answer be sure to:
• state the hypothesis your experiment will test [1]
• state how the control group will be treated differently from the experimental group
[1]
• state two factors that must be kept the same in both the experimental and control groups [1]
• state the type of data that should be collected to determine if the hypothesis is supported [1]
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