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Making Connections


In order to find a hypothesis, one looks for _______________. Connections.
Graphs and tables present data in clear and _____________ ways that is easy to understand. Organized.
Pulse rate ______________ during exercise because the cells need to be provided with more _____________ and more wastes are produced. Increased, nutrients.
Nutrients and wastes are transported to the __________ (oxygen) and the kidneys (urea). Lungs.
Muscles become fatigued, due to waste products building up in them. __________ ___________ produces muscle fatigue. Lactic acid.
True or False: Organ systems interact in order to maintain homeostasis. True.
During the procedure, students found their average _______ ________ after three trials. Pulse rates.
Class results were graphed in a connected bar graph called a ___________. Histogram.
Pulse rates were found to ____________ after exercising. Increase.
True or False: In the procedure, the clothespin was squeezed rapidly for one minute. The number of times it was squeezed was recorded. True.
The clothespin was squeezed the same way for another minute. The second time produced a lesser number of squeezes for most people due to _____________ _______________. Muscle fatigue.
The ______________ system takes in oxygen, which is transported to the cells with the ______________ system. As cells use oxygen at a higher rate, an increased heart rate would get the oxygen to the cells more _____________. Respiratory, circulatory, quickly.
As muscle cells increase their activity, they produce waste products at a higher rate. These wastes are carried to the __________ system by the blood more efficiently when the heart rate increases. Excretory.
A reliable way to test a hypothesis or a claim. Doing an experiment.
What is necessary in order to have an experiment? Problem, hypothesis, observations/data, conclusion, materials, procedure, graphs, title.
The variable that the scientist changes, put on the x-axis. Independent variable.
The variable that is affected by the independent variable, the results, y-axis. Dependent variable.
True or False: Having more than one independent or dependent variable makes the experiment more valid. False, there should only be one of each.
The experimental setup without the independent variable, used to compare the results obtained by the independent variable. Control.
Increasing the amount of trials increases the ____________ of the experiment. Validity.
It is important to follow the _____________ of your experiment. Guidelines.
A conclusion includes a claim that either supports or refutes your ____________ and suggestions for further research and improvement. Hypothesis.
The format used for your title. The effect of _____________ on ____________.
What is the first step of an experiment? Determining the question you're trying to answer.
What activity in the lab demonstrated muscle fatigue? Repeatedly squeezing a clothespin.
What was graphed in the histogram? The number of students in each average pulse rate.
In order to prove two things have a connection, one should preform an _______________. Experiment.
Having a lower number the second round of squeezing a clothespin shows that.... Muscle cells become fatigued as waste products build up inside of them.
Why does someone's pulse rate increase after exercise? Muscles need extra oxygen and food to replace what was used up.
The amount of times the clothespin was squeezed was the ____________ variable. Dependent.
A tentative statement about the expected relationship. Hypothesis.
True or False: In this experiment, it was important that students took part in the same level of physical intensity. True.
What should you know before starting the experiment? Safety precautions, references to prior experiments.
True or False: The same person rarely has the same resting pulse rate at different times of the day. True.
True or False: An incorrect hypothesis does not have significant value. False, it has much value.
Peer review. The sharing of information using scientific journals, presentation, or the internet.
Created by: emarciante9



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