(hint: Think of the variables you are dealing with when you create your explanation. I did not put a scale on this graph on purpose!)
Wednesday, September 8, 2010
5th prd. Assignment - 9/10
At this point in our class, we have been using time as our independent (x-axis) variable - everything has been dependent on time (ex: the distance traveled depended on the time; as time went on, our distance increased). The graph below shows the results of an experiment conducted to see the relationship of 'dissolve time' and 'temperature' of salt in water. This graph now shows time on the y-axis, which indicates that it is our dependent variable. Is this possible? Explain.
(hint: Think of the variables you are dealing with when you create your explanation. I did not put a scale on this graph on purpose!)
(hint: Think of the variables you are dealing with when you create your explanation. I did not put a scale on this graph on purpose!)
19 comments:
Yes, it is very possible for it to be the dependent variable. A dependent variable is affected by the independent variable. If the temperature is low, at about 10 degrees, the salt will not dissolve quickly. But if it is hot, the salt will dissolve. The time it takes to dissolve depends on how high the the temperature is. In this experiment, time won't affect temperature. Even if you boil it for days, the temperature will not change. Time doesn't affect temperature, but temperature affects time.
I think it is possible for time to be a dependant variable. The dependant variable on the y-axis is affected by the independent variable on the x-axis. In the example, it shows time as the dependant variable and temperature as the independent variable. If the temperature was low, the salt won't dissolve quickly (the temp. is affecting the time!). The amount of time doesn't affect the temperature, therefore, time can be a dependant variable.
I think it is very much possible because if the temperature outside is snowing and cold the salty water would freeze but if the temperature outside is sunny and 105 degrees then the salty water would evaporate faster! The time would not affect the temperature!
yes you can put it as a dependent variable becuse a dependent variable is affected by the independent variable, so if the temp is low the salt will not dissolve if the temp. is not high so if it does not dissolve the time won't stop. so in this case time will be affected by the temp.
Depending on the variables this graph very well could be possible. If the graph had a scale and the temperature goes down during the time it took to dissolve the salt in the water it could be very possible. Usually time is on the x axis because it stands on its own but temperature could also stand on its own because if there was something else on the y axis the graph would still be possible. If the amount of salt was on the y axis the graph would still work.
In this case it is possible to have time on the y-axis as the dependent variable. This is because in this graph the amount of time it takes to dissolve salt in water is based on the temperature of the water. In this experiment the time it takes to dissolve salt in water depends on the temperature of the water. The higher the temperature the faster the salt will dissolve. Therefore the amount of time is dependent on the water temperature so time becomes the dependent variable.
Yes it is possible for the time to be on the y-axis. It is possible because it's not just time it's the dissolving time. Whenever something like salt dissolves it isn’t going to be the same every time. Also for the temperature being on the x-axis it’s consistently changing you can’t control that unless you have a fan right n top if the cup where the salt is dissolving. So yes the time can be on the Y-axis as long as goes along with the x-axis being correct.
This is possible, because tempurature is on the x axis(horizontal axis), so this means that the time it takes for the substance to dissolve depends on the tempurature. This means that tempurature is the independent variable, which goes on the vertical axis, and the dependent is time. On most graphs, time is usually on the x axis, because it is usually the independent variable. In this case it is the dependent variable, so someone can conclude that this is possible.
Yes it is very posible to have time as the dependent variable because the dependent varable is changed by independent varible say if the temp. is like 20 degrees cooler the salt will not dissolve as fast.
It is, in fact possible for the time to be the dependent variable in this test. This is because the time of the dissolve is dependent on the temperature of the water. The time that is being used in the experiment is like a stopwatch time; it CAN be stopped and started on command, unlike real time which keeps going and never stops no matter how hard you try. In other words, when they say time in this experiment is not really time, as in space time. It’s time as in ”stopwatch” time.
Yes it is possible for time to be on the y-axis. In this case they had probably used a stopwatch to see how long it would take for the salt to dissolve. Since it is the dependent variable it depends on the independent variable. So the temperature could have been the reason, for instance if the temperature is high the salt will have a quicker time to dissolve. So if the temperature is low then the time will have a longer time.
Yes, this is possible for the dissolve time to be the dependent variable and for the temperature to be the independent variable. This is because the dissolve time (Y axis) depends on the temperature (X axis), and the dependent variable always depends on the independent, which in this case, the independent variable is not time, it is temperature. For example, if the temperature is 102 degrees Fahrenheit, then the dissolve time will take less time. But if it is 65 degrees Fahrenheit, then the dissolve time will take more time. My example shows that the dissolve time depends on the temperature, which in this case, is okay! The hotter it is, the longer time it will take for the salt to dissolve! Time isn’t always the independent variable…just remember that the dependent (responding) variable (Y axis) always depends on the independent (manipulated) variable which is on the X axis. In this case, the dissolve time depends on the temperature. So therefore, this graph is correct.
The fact is, dissolve time decreases as temperature increases. Let’s say you have a pot with boiling water in it. If you put salt in the boiling water it will dissolve quickly. Now let’s say you put salt in a pot with freezing water. It will take longer to dissolve the salt in the cold water, than it would in the boiling water. So yes, I think that the graph is possible based on how you scale your x-axis. If you put 32 degrees Fahrenheit at the point of the x and y axis and then you put 212 degrees at the furthest point of the x-axis and you put 0 minutes at the point of x and y axis (you don’t have to do minutes, just an example) and put however many minutes you want at the farthest point on the y- axis.
Yes it’s possible because this is a multi-experiment graph. A multi-experiment graph is where you have more than one experiment. The dissolve time decreases as the temperature increases. What this graph is doing is comparing the two variables. Example: Experiment 1-You put in one grain of salt and see how long it takes to dissolve let’s say it takes about 20 minutes to dissolve. Okay that experiment is done record it. Experiment 2 – You put in another grain of salt and it takes a shorter amount of time because the temperature increased. The graph shows the amount of time it takes for salt in water to dissolve making it possible to have time on the X-axis.
No it is not possible because time always is on your X-axis. There is no way to put time on the Y-axis because time is an independent variable. You can never change time to the Y-axis it is always a independent variable.
Yes, I think it is possible to show time on the y-axis or for it to become our dependent variable. A dependent variable is affected by the independent variable. For example, if the temperature is low, the salt won’t dissolve quickly, so the temperature is affecting the time. Therefore, the amount of time doesn’t affect the temperature, making it possible for time to be the dependent variable.
It is possible for the time to be on the y-axis, if the temperature determines how fast the salt will dissolve, which means the time is the outcome. This makes the time dependent variable temperature. For example if I were doing an experiment when the temperature of the water was 70 degrees opposed to 100 degrees the salt would dissolve faster because the temperature was higher. If you were to have the salt dissolve over a period amount of time (a few hours, days, weeks) the outcome still relies on the temperature. For example on the experiment you would have two beakers of salt water and you had them both on 90 degrees it wouldn’t change how fast the salt would dissolve. Unlike a 90 degree beaker and a 140 degree beaker, then it would depend on the temperature of the salt water to dissolve. This shows that it is possible to have the time on the vertical, y-axis, and the dependent variable, temperature on the horizontal, x-axis, as the independent variable.
Yes, I think it is very possible for Time to be on the Y axis, and be our dependent varibale. This shows that Time (our dependent variable) will be affected by the Independent variable. So it means that the time it takes for the salt to dissolve DEPENDES on what the tempeture is…So if the tempuature is high, then it will take LESS time for the salt to dissolve…But, if the tempuature is low, it will take more time for the salt to dissovle. So the time it takes for the salt to dissolve depends on how high or low the tempuature is. Therefore, time doesn't affect the tempuature of it, but the tempuature affects the time. So, time can be on the y axis (dependent variable), because time can depend on something else that might be affecting it.
On the x-axis ( which is usually horizontal) that would be where you write your independent variable, which is usually time. On the y-axis ( which is usually vertical) that would be where you write your dependent variable. Next, you should make a title for your graph and put on the top ( this part is forgotten sometimes but important) in the title you should try to mention the independent and dependent variables. Also, another very important step is to make a scale for the graph I can,t help you on that one because each scale depends on the subject you are graphing. Of course next, you should start on the points for the graph. Then you can connect the points if you want to see a trend ( be careful that your teachers okay with connecting the points).
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