GIZMO Effect of Environment on New Life Forms

Exam (elaborations) GIZMO Effect of Environment on New Life Forms Student Exploration: Effect of Environment on New Life Form Vocabulary: controlled experiment, hypothesis, variable Prior Knowledge Question (Do this BEFORE using the Gizmo.) Johnny likes to watch the birds that visit his birdfeeder. His favorite bird is the cardinal. How could Johnny determine which kind of birdseed cardinals prefer? Explain your answer in detail. _ By making an experiment of one week of one certain cardinal to see which one did he eat the most within the week. _ Gizmo Warm-up Imagine a new alien life form has just been discovered on a nearby planet. Your job is to study this new life form. The Effect of Environment on New Life Form Gizmo shows 100 individuals that have been transported from the planet to your laboratory. 1. The new life form can have three shapes: thin, medium, and thick. How many of each shape are there now? Thin: __26___ Medium: __54__ Thick: __20__ 2. Click Play ( ). Do the numbers of each type of alien change over time? ____yes_____ 3. Click Reset ( ). A variable is something that can be changed in an experiment. Look on the SIMULATION pane. What are the three variables you can change in your laboratory? __Light, water, and temperature_____________ 4. Which of these variables do you think will have the greatest effect on the aliens? Explain. The temperature because of the way they need to change as the temp dose like animals do This study source was downloaded by from CourseH on :44:23 GMT -05:00 This study resource was shared via CourseH GIZMO Effect of Environment on New Life Forms 2019 Activity: Controlling variables Get the Gizmo ready:  Click Reset.  Select the BAR CHART tab.  Turn on Show numerical values. Question: What variables control the shape of the alien life forms? 1. Record : Record the starting numbers of thin, medium, and thick aliens: Thin: __94__ Medium: ___2___ Thick: ___4__ 2. Observe : Change the Light to 0 hours/day, the Water to 1 drops/hr, and the Temp. to 0 °C. Click Play, and observe the aliens until the numbers are stable. Click Pause. A. How many of each type of alien are there now? Thin: ___96__ Medium: ___3___ Thick: ___1___ B. Click Reset. Change the Light to 24 hours/day, the Water to 20 drops/hr, and the Temp. to 30 °C. Click Play. How many of each type of alien are there now? Thin: _38___ Medium: ___10__ Thick: __42___ 3. Analyze : From the observations you made above, can you state exactly why the aliens changed their shape? Why or why not? Because of the temperature which had changed their way to take in the food. 4. Form a hypothesis : A hypothesis is a proposed explanation for an observation. Hypotheses must be testable. Write a hypothesis about what causes the aliens to change their shape. If the temperature changes then the number of skinny and thick aliens would change. (Activity continued on next page) This study source was downloaded by from CourseH on :44:23 GMT -05:00 This study resource was shared via CourseH 2019 Activity (continued from previous page) 5. Design an experimen t: A controlled experiment is an experiment in which only one variable is changed at a time. Describe a controlled experiment you could use to