Introduction to Biology Lesson 3 100 Points NAME

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Introduction to Biology Lesson 3 100 Points NAME Powered By Docstoc
					                                        Introduction to Biology
                                               Lesson 3
                                              100 Points
NAME ____________________
                         SCIENTIFIC METHOD MATCHING
Directions: Cut out the definitions on the next page that says “Scientific Method Definitions”. Match
the appropriate definition with the scientific vocabulary term shown below. Pages 3 – 15 will help you.
           Vocabulary Term                                             Definition


            Scientific Method



   Steps of the Scientific Method:



1. Problem




2. Research/Background Information




3. Hypothesis




4. Observation




5. Experiment




                                            Lesson 3 Page 1
                                  Introduction to Biology
                                         Lesson 3
                                        100 Points



   A. Independent Variable




   B. Dependent Variable




   C. Control




   D. Constants




   E. Repeated Trials




6. Data Collection and Analysis




7. Conclusion




                                    Lesson 3 Page 2
                                Introduction to Biology
                                       Lesson 3
                                      100 Points
                            CONTROLLED EXPERIMENTS

Directions: For each description, determine the following: hypothesis, independent
              variable, dependent variable, control, and any factors that would need to
              be constant.

1. A zoologist wants to know if feeding mice a vitamin supplement will make them grow
larger. She feeds five mice their regular food, and she feeds five other mice food with
vitamins. She measures the weight of the mice at the start and end of the experiment.

hypothesis:
________________________________________________________________________

independent variable: ______________________________________________________

dependent variable: __________________________________________

control: _____________________________________________

constants: __________________________________________

2. A student is interested in the effect of the temperature of water in her aquarium on the
activity level of her fish. She divides her aquarium water and fish into three aquariums,
one that is maintained at room temperature (about 70F), one that is heated to 80F, and
one that is cooled to 60F. At six p.m. each day, she watched the fish for 30 minutes and
records her observation about their activity.

hypothesis:
________________________________________________________________________

independent variable: ____________________________________

dependent variable: ______________________________________

control: ________________________________________________

constants:
________________________________________________________________________

4. The student described in # 3 is also curious about which kind of fish food will make
her fish the most active. She decides to test fish food type in the experiment described
above. Explain why this is not a good idea.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________


                                     Lesson 3 Page 3
                              Introduction to Biology
                                     Lesson 3
                                    100 Points
                       THE CASE OF THE SLEEPING FROG

Directions: Read the following paragraphs that describe an investigation conducted by
Kara, a bright science student. Put the paragraphs in the correct sequence by writing
the appropriate number on the line provided and label them with the step of the
scientific method they represent. You will use this information to answer the analysis
questions based on Kara’s experiment. (14 points)
______ Kara obtained two one-liter jars and placed a frog in each. She inserted a
            thermometer through a hole in the screened lid of each jar. She then placed
            each jar inside a larger jar. Kara filled one of the larger jars with ice cubes
            until the cubes surrounded the smaller jar that held the frog. Kara did not put
            any ice cubes in the other set of jars.
Step of scientific method __________________

______ Kara went to the library to read about hibernation. She read several articles on
            the topic.
Step of scientific method __________________

______ Kara, a curious frog loving science student, wanted to know how she could make
            a frog hibernate.
Step of scientific method __________________

______ Kara created a graph of the data to help her determine what had happened and
            why.
Step of scientific method __________________

______ Every 30 minutes, Kara recorded the temperature inside each of the two smaller
            jars. She also recorded the breathing rate of the frog and other observations
            about the frog’s appearance and behavior. Kara noted that in the jar with the
            ice cubes, the frog began to move more slowly and finally seemed to go to
            sleep. The frog’s rate of breathing became slower, too. These changes did
            not occur in the other jar. When the ice was removed from the first jar, the
            frog gradually became more active.
Step of scientific method __________________
______ After reading about the topic, Kara made an educated guess. She guessed that
            she could make a frog hibernate by making it cold.
Step of scientific method __________________

______ Kara came up with a summary of the results of her experiment.
Step of scientific method ______________________




                                     Lesson 3 Page 4
                                  Introduction to Biology
                                         Lesson 3
                                        100 Points
Directions: Use the set of ordered squares to answer the following analysis questions
          related to Kara’s experiment

   1. What was Kara’s hypothesis? What clued you in that this was her hypothesis?
      (2pts)
      __________________________________________________________________
      __________________________________________________________________

   2. Here is a list of Kara’s materials, complete the diagrams below to show an
      example of the set up that Kara used for her experiment, including the
      thermometers, screened lids, small jars, large jars, frogs, and ice cubes. Be
      sure to label all parts on both pictures. (11 points)

                      Without Ice                               With Ice

  Jar A                                       Jar B




a. List the materials that remained constant? (1 point)
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________

b. Which material is the variable? (1 point)
________________________________________________________________________

c. Label the control group and the experimental group. (2 points)

4. A) What is the independent variable (1 pt) (what does Kara control in the
     experiment)? _______________________________

   B) What is the dependent variable (1 pt) (what depends on the independent variable)?
                     _______________________________




                                    Lesson 3 Page 5
                                  Introduction to Biology
                                         Lesson 3
                                        100 Points
   C) What jar serves as the control? Why?
   _____________________________________________________________________
   _____________________________________________________________________

5. Here is Kara’s data. Use graph paper to graph the temperature and breathing rate over
time. You will have four lines (one for temperature Jar A, temperature Jar B, breathing
rate jar A and breathing rate jar B). You must create a KEY. (10 points)

Time             Temperature          Breathing Rate          Activity Level
             Jar A     Jar B       Jar A      Jar B      Jar A        Jar B
0 min          22ºC      22ºC          29         30       Normal       Normal
30 min         22ºC      20ºC          30         26       Normal       Normal
60 min         22ºC      15ºC          31         21       Normal       Slowing
90 min         22ºC       8ºC          30         18       Normal        Slow
120 min        22ºC       4ºC          29         14       Normal      Sleeping
150 min        22ºC       4ºC          29         17       Normal      Sleeping
180 min        22ºC       4ºC          30         16       Normal      Sleeping
210 min        22ºC      14ºC          31         20       Normal       Waking
240 min        22ºC      18ºC          28         25       Normal       Normal
270 min        22ºC      22ºC          30         29       Normal       Normal

6. Explain in complete sentences what Kara’s results show for:

   Jar A:
   _____________________________________________________________________
   _____________________________________________________________________
   _____________________________________________________________________

   Jar B:
   _____________________________________________________________________
   _____________________________________________________________________
   _____________________________________________________________________

7. Conclusions:

   A. What was the problem Kara wanted to investigate?
   _____________________________________________________________________

   B. Do her results support her hypothesis? Why or why not?
   _____________________________________________________________________
   _____________________________________________________________________

   C. What conclusions can Kara draw from her experiment? Provide a biological
   explanation for her results (what happens when things get cold?)
   _____________________________________________________________________
   _____________________________________________________________________


                                    Lesson 3 Page 6
                                 Introduction to Biology
                                        Lesson 3
                                       100 Points




An interpretation and summary of the results
                                                 Using all the senses to study a problem
of an experiment based on the collected data


 Accurate recording of data in an organized    The factor that responds or depends upon
 manner (may include tables, graphs, etc.)      the independent variable (can be many)


                                                 Performing the experiment numerous
 A test for the hypothesis performed under
                                                    times or having many trials run
            controlled conditions
                                                    simultaneously to verify results


  Factors that remain the same during an        The factor that is used as the standard to
                 experiment                          which everything is compared


                                                   A statement that can be tested as a
  A logical and organized way to solve a
                                                    possible explanation for a set of
                 problem
                                                              observations


  Some questions about the world and the          Searching, collecting, and studying
            occurrences in it                    information from a variety of sources


 The one and only factor that is changed or
varied by the experimenter in an experiment




                                   Lesson 3 Page 7

				
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