The heart is an organ that pumps blood throughout the circulatory system in the body. Red blood cells are a tissue in the body that carry nutrients to the body's cells and waste away from the body's cells. The heart rate increases or decreases depending on the body's needs to transport nutrients and waste.In an experiment, a female had her heart monitored. For one minute, she sat in a chair quietly. At the end of the first minute to the end of the third minute she did jumping jacks. Finally, she sat again in the chair and waited until her heart rate went back to her resting heart rate as measured in the first minute. After performing this experiment, the following graph was created.Using the data in Graph 1, what will the heart rate be in the 8th minute if the person continued to rest?
Answer(s): B
As seen in Graph 1, the heart rate decreased until it returned to the initial resting heart rate. Because the participant was continuing to rest, the heart rate would reflect that of a resting period.
The heart is an organ that pumps blood throughout the circulatory system in the body. Red blood cells are a tissue in the body that carry nutrients to the body's cells and waste away from the body's cells. The heart rate increases or decreases depending on the body's needs to transport nutrients and waste.In an experiment, a female had her heart monitored. For one minute, she sat in a chair quietly. At the end of the first minute to the end of the third minute she did jumping jacks. Finally, she sat again in the chair and waited until her heart rate went back to her resting heart rate as measured in the first minute. After performing this experiment, the following graph was created.Which of the following tables accurately displays the information found in Graph 1?
Answer(s): A
Note that Graph 1 begins at minute 0, and ends at minute 6, therefore the only table that accurately reflects Graph 1 is choice A.
The heart is an organ that pumps blood throughout the circulatory system in the body. Red blood cells are a tissue in the body that carry nutrients to the body's cells and waste away from the body's cells. The heart rate increases or decreases depending on the body's needs to transport nutrients and waste.In an experiment, a female had her heart monitored. For one minute, she sat in a chair quietly. At the end of the first minute to the end of the third minute she did jumping jacks. Finally, she sat again in the chair and waited until her heart rate went back to her resting heart rate as measured in the first minute. After performing this experiment, the following graph was created.If this experiment were to be recreated using a male participant, what would you expect the graph to look like?
Answer(s): C
The graph would not look exactly alike because the male participant is likely to have different resting and peak heart rates. There is no evidence to suggest that choices B or D are correct. Only C states what the graph is likely to look like.
The heart is an organ that pumps blood throughout the circulatory system in the body. Red blood cells are a tissue in the body that carry nutrients to the body's cells and waste away from the body's cells. The heart rate increases or decreases depending on the body's needs to transport nutrients and waste.In an experiment, a female had her heart monitored. For one minute, she sat in a chair quietly. At the end of the first minute to the end of the third minute she did jumping jacks. Finally, she sat again in the chair and waited until her heart rate went back to her resting heart rate as measured in the first minute. After performing this experiment, the following graph was created.What would be an appropriate title for Graph 1?
The experiment is attempting to show the heartbeats per minute during rest and exercise, therefore it is reasonable that the title of the graph would be Heartbeats per Minute during Rest and Exercise. There is no mention of the gender of the participant on the graph, so choices A and C are incorrect, and the title Rest and Exercise is incomplete.
Lorna noticed that the amount of time needed to boil water was related to the shape of container she was using. She decided to measure the time necessary to bring 500 ml of water at room temperature to a boil on preheated hotplates. She used five cylindrical 500 milliliter Pyrex glass containers, each having the same wall thickness but a different base radius and height. In other words, some containers were narrow and long, others were wide and shallow. This is the table she prepared to record her data.She placed each container containing the same amount of water on a hotplate, and placed a thermometer in each one to monitor the temperature. She noticed that the temperature was increasing faster in the containers with a larger radius. After some time, she observed boiling in the 10 cm radius container. She was about to record the time in the table she had set up, but noticed that there seemed to be less water in that container than she originally put in. She transferred the water into a graduated cylinder, and indeed found that the volume was below 300 ml. She proceeded with her experiment. The boiling in container 5 was followed by boiling in containers 4, 3, 2, and 1, in that order. Lorna checked the volume of the water in each container and found that it was lower than 300 ml. She also found that the decrease in volume was highest in the container with the largest radius. In container 1, volume decrease was barely detectable. While the decrease in volumes prevented her from getting meaningful data on boiling, they gave her an idea of how container shapes affect boiling times. In addition, she got an idea for her next project evaporation from containers of different shapes.The experiment suggests that:
Water in container 5, which has the largest radius, boils first. Water in other containers confirms this trend. You may have been tempted to choose D, because of the statement that Lorna was not able to collect quantitative data. However, there seemed to be a clear trend to support B and the statement that she obtained qualitative data means that she was confident that although the exact boiling times could be off, the trend she observed was real.
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