The dependent variables are those that are observed to change in response to the independent variables.
The independent variables are those that are deliberately manipulated to invoke a change in the dependent variables.
Control variables are those variables that are not changed throughout the trials in an experiment.Define independent, dependent variable and control ?
im pretty sure that x is the independent variable and y is the dependent variabe but i dunno what control is. SorryDefine independent, dependent variable and control ?
math stuff
Friday, May 14, 2010
Experiment v.s. control, and manipulative variable v.s. responding variable?
oh and relationship among hypothesis, theory, and scientific law and also chemistry v.s. physicsExperiment v.s. control, and manipulative variable v.s. responding variable?
...
Experiment is what happens when you take a variable and ';control'; all other aspects of the environment for the procedure.
The manipulative variable is the variable that you change in an experiment in order to see what happens to the responding variable.
Chemistry deals with elements, formulas and reactions, while physics deals with laws of motion and inertia.Experiment v.s. control, and manipulative variable v.s. responding variable?
uuuuh.....the second one. haha
don't know. sorry. ciao ciao. mua.
Elena
...
Experiment is what happens when you take a variable and ';control'; all other aspects of the environment for the procedure.
The manipulative variable is the variable that you change in an experiment in order to see what happens to the responding variable.
Chemistry deals with elements, formulas and reactions, while physics deals with laws of motion and inertia.Experiment v.s. control, and manipulative variable v.s. responding variable?
uuuuh.....the second one. haha
don't know. sorry. ciao ciao. mua.
Elena
How do vms's ( Variable Message Signs) communicate with traffic control?
im talking about the one's in the uk by the wayHow do vms's ( Variable Message Signs) communicate with traffic control?
I believe they are controlled from the area police HQ.
How its actually done i can only guess, a few keystrokes are made then the info is sent to the local controller for that sign. If you look on motorways some grey boxes near signs have a laser warning sticker on them, so perhaps the info comes down via laser on a fibre optic cableHow do vms's ( Variable Message Signs) communicate with traffic control?
VMS can use a variety of technology to communicate with the regional control centre. In the UK they can use the Internet (TCP/IP), GSM, Corporate Network (TCP/IP)beauty
I believe they are controlled from the area police HQ.
How its actually done i can only guess, a few keystrokes are made then the info is sent to the local controller for that sign. If you look on motorways some grey boxes near signs have a laser warning sticker on them, so perhaps the info comes down via laser on a fibre optic cableHow do vms's ( Variable Message Signs) communicate with traffic control?
VMS can use a variety of technology to communicate with the regional control centre. In the UK they can use the Internet (TCP/IP), GSM, Corporate Network (TCP/IP)
Why is it important to control variables in an experiment?
scientific inquiryWhy is it important to control variables in an experiment?
If you don't understand your variables, how can you make a valid conclusion on your experiment?
The conclusion would be meaningless without knowing exactly what went into the results, that is, the variables.Why is it important to control variables in an experiment?
bc otherwise change could be attributed to more than just the one thing you're experimenting about.
Simply put, you want to make sure that the final result of your experiment is due to the principle being studied, and not an unknown cause.
Too many variables make computation of results much more complex ( assuming in your final analysis you want to prove a relationship by a formula) and render you result more inaccurate by introducing a error of margin with every variable
If you don't control the variables, how do you know what causes the change you are measuring?
without a controlled variable you wouldn't be able to find specific data. You will have lots of data but none of it relevent with what your looking for...for instance....you want to find out in which soil that a tomato plant grows best in...if you change the temperature of the air and the amount of water in each tomato as well as the type of soil.....you wouldn't be able to know exactly which soil is best due to all the other variables.
Are you testing the experiments or the variables
to keep your results reasonable. if you dont controll the variables anything could vary the results and you could never know what it was
when variables are not controlled you won't know why the outcome is what it is and you can't prove anything
an experiment by definition must be controlled.....each experiment can only have a limited number of variables or you are not comparing apples to apples so to speak.
if you dont control variables then you havent solved anything, for instance, you wana know why the barrel exploded. Ok so you find a barrel and kick it, it dosent explode, so what did you learn? nothing, because they werent the same type of barrel, you have to control variables to learn what is causing what you want to know.
It is important to know and control variables in any experiment in order to make the experiment reproducible outside of the lab.
the control of variable in an experiment is to reduce the risk that the results of the experiment are influenced by anything besides the variable being tested
Think about if you were looking at temperature and air pressure as two variables that affect a certain process. If you want to know how the temperature affects the process you must control the air pressure so that the only difference in the experiments is the temp. If you don't control a variable it will be nearly impossible to find the affect of a single variable.
It is pertinent to control the variables of any experiment. If all factors are not controlled the data is not concrete. If you have factors contributing to changing the eventual outcome you will never get the information correctly. This is another reason why it is always important to run a ';control'; set along with any experiment.
that way you know you are getting acurate results. so you can duplicate the experimentif need be and get the EXACT same thing.
If you don't control the variables and let them go crazy the conclusion that you come up with will be invalid. Think about it this way...when you cook something, let's say rice and you add too much water you will end up with porridge. If you don't add enough water then you end up with hard rice. The variable here is water. You need to control it to get the results you want. It's not the best analogy but hopefully you get the point.
Variables are the things that you change or keep the same in your experiment. If you change more than one thing, how do you know which change affected the results? If you change just one thing, than the results will be attributed to this one change.
Well the other day my variables got out of control, those damn chickens got everywhere, had to spray paint em.
If you don't understand your variables, how can you make a valid conclusion on your experiment?
The conclusion would be meaningless without knowing exactly what went into the results, that is, the variables.Why is it important to control variables in an experiment?
bc otherwise change could be attributed to more than just the one thing you're experimenting about.
Simply put, you want to make sure that the final result of your experiment is due to the principle being studied, and not an unknown cause.
Too many variables make computation of results much more complex ( assuming in your final analysis you want to prove a relationship by a formula) and render you result more inaccurate by introducing a error of margin with every variable
If you don't control the variables, how do you know what causes the change you are measuring?
without a controlled variable you wouldn't be able to find specific data. You will have lots of data but none of it relevent with what your looking for...for instance....you want to find out in which soil that a tomato plant grows best in...if you change the temperature of the air and the amount of water in each tomato as well as the type of soil.....you wouldn't be able to know exactly which soil is best due to all the other variables.
Are you testing the experiments or the variables
to keep your results reasonable. if you dont controll the variables anything could vary the results and you could never know what it was
when variables are not controlled you won't know why the outcome is what it is and you can't prove anything
an experiment by definition must be controlled.....each experiment can only have a limited number of variables or you are not comparing apples to apples so to speak.
if you dont control variables then you havent solved anything, for instance, you wana know why the barrel exploded. Ok so you find a barrel and kick it, it dosent explode, so what did you learn? nothing, because they werent the same type of barrel, you have to control variables to learn what is causing what you want to know.
It is important to know and control variables in any experiment in order to make the experiment reproducible outside of the lab.
the control of variable in an experiment is to reduce the risk that the results of the experiment are influenced by anything besides the variable being tested
Think about if you were looking at temperature and air pressure as two variables that affect a certain process. If you want to know how the temperature affects the process you must control the air pressure so that the only difference in the experiments is the temp. If you don't control a variable it will be nearly impossible to find the affect of a single variable.
It is pertinent to control the variables of any experiment. If all factors are not controlled the data is not concrete. If you have factors contributing to changing the eventual outcome you will never get the information correctly. This is another reason why it is always important to run a ';control'; set along with any experiment.
that way you know you are getting acurate results. so you can duplicate the experimentif need be and get the EXACT same thing.
If you don't control the variables and let them go crazy the conclusion that you come up with will be invalid. Think about it this way...when you cook something, let's say rice and you add too much water you will end up with porridge. If you don't add enough water then you end up with hard rice. The variable here is water. You need to control it to get the results you want. It's not the best analogy but hopefully you get the point.
Variables are the things that you change or keep the same in your experiment. If you change more than one thing, how do you know which change affected the results? If you change just one thing, than the results will be attributed to this one change.
Well the other day my variables got out of control, those damn chickens got everywhere, had to spray paint em.
What is a responding variable,operational definition,manipulated variable,controlled variable and variable?
I need it for schoolWhat is a responding variable,operational definition,manipulated variable,controlled variable and variable?
Manipulated variable- is the thing that will be changed.
Controlled variable- is the thing in the experiment that will not be changed. like water on plants. its what you compare your results to.
Operational definition- experimental procedure for changing the variable to a measurement or numeric value.
I think the responding is how you measure your change.
Hope this helped!!
Manipulated variable- is the thing that will be changed.
Controlled variable- is the thing in the experiment that will not be changed. like water on plants. its what you compare your results to.
Operational definition- experimental procedure for changing the variable to a measurement or numeric value.
I think the responding is how you measure your change.
Hope this helped!!
Can you tell me the control,independent variable, and dependent variable for this experiment?
In this lab you will observe the activity of hydrogen peroxidase from potatoes and determine the speed
(rate) of reaction catalyzed by this enzyme.
Materials (per group)
10 50-mL plastic cups Sharpie Marker potato solution
3 50- or 100-mL Graduated cylinders labeling tape distilled water (15掳C)
1% hydrogen peroxide (H2O2) forceps 10 filter-paper disks
Procedure
1. Obtain five 50-mL small plastic cups and label them as follows: #1, 100% enzyme; #2, 75%
enzyme; #3, 50% enzyme; #4, 25% enzyme, #5, 0% enzyme. You can write directly on the cups
with the Sharpies.
2. Obtain three graduated cylinders and label them with labeling tape and a marker as follows: #1,
enzyme; #2, distilled H2O; #3, 1% H2O2. Set aside graduated cylinder #3 for use later. Only use
the graduated cylinders for the appropriate liquid鈥攁void cross contamination at all costs!
Y
2H2O2 Hydrogen Peroxidase 2H2O + O2
Substrate Enzyme Product(s)
3. Using the labeled graduated cylinders for the appropriate solutions, obtain potato solution and
distilled water. Prepare five solutions containing different concentrations of enzyme in the five
numbered beakers or cups according to the following mixtures:
Beaker # Enzyme (potato solution) Distilled H2O (15掳C)
1 (100%) 40 mL 0 mL
2 (75%) 30 mL 10 mL
3 (50%) 20 mL 20 mL
4 (25%) 10 mL 30 mL
5 (0%) 0 mL 40 mL
4. Obtain five more 50-mL cups and label them A, B, C, D, and E. Using the graduated cylinder
labeled 1% H2O2, add 40 mL of hydrogen peroxide (the substrate) to each beaker. The reactions
are now ready to run.
5. Using the forceps, obtain ten filter-paper disks. Set them on a dry paper towel.
6. Using the forceps, take one filter-paper disk and immerse it in beaker #1. Allow the disk to
absorb the enzyme solution for 5 seconds. Remove the disk and drain it for 10 seconds on a
paper towel. Drop the disk into beaker A. Observe the disk鈥檚 movement, and note the time
when the disk reaches the surface. Record the time in the Data Table. Convert the time from
seconds into minutes. Also record this in the Data Table.
7. Repeat step 6 for a second trial. Record your results in the Data Table.
8. Repeat the procedure in step 6 using beaker #2 and beaker B. Also run two trials.
9. Repeat steps 6 and 7 using beaker #3 and beaker C. Run two trials.
10. Repeat steps 6 and 7 using beaker #4 and beaker D. Run two trials.
11. Repeat steps 6 and 7 using beaker #5 and beaker E. Run two trials.
12. Calculate the reaction rate, or speed of the reactions. Divide the concentration of the enzyme
(remember to convert from percentage to decimal) by the time it took the disk to reach the
surface.Can you tell me the control,independent variable, and dependent variable for this experiment?
thedependent variable is the rate of reaction becase the it is affected by the different enzymes (the independent variable) i think so anyway didn't read most if the stuff you put up thereCan you tell me the control,independent variable, and dependent variable for this experiment?
the control is the substance that you did not add or do anything to
(rate) of reaction catalyzed by this enzyme.
Materials (per group)
10 50-mL plastic cups Sharpie Marker potato solution
3 50- or 100-mL Graduated cylinders labeling tape distilled water (15掳C)
1% hydrogen peroxide (H2O2) forceps 10 filter-paper disks
Procedure
1. Obtain five 50-mL small plastic cups and label them as follows: #1, 100% enzyme; #2, 75%
enzyme; #3, 50% enzyme; #4, 25% enzyme, #5, 0% enzyme. You can write directly on the cups
with the Sharpies.
2. Obtain three graduated cylinders and label them with labeling tape and a marker as follows: #1,
enzyme; #2, distilled H2O; #3, 1% H2O2. Set aside graduated cylinder #3 for use later. Only use
the graduated cylinders for the appropriate liquid鈥攁void cross contamination at all costs!
Y
2H2O2 Hydrogen Peroxidase 2H2O + O2
Substrate Enzyme Product(s)
3. Using the labeled graduated cylinders for the appropriate solutions, obtain potato solution and
distilled water. Prepare five solutions containing different concentrations of enzyme in the five
numbered beakers or cups according to the following mixtures:
Beaker # Enzyme (potato solution) Distilled H2O (15掳C)
1 (100%) 40 mL 0 mL
2 (75%) 30 mL 10 mL
3 (50%) 20 mL 20 mL
4 (25%) 10 mL 30 mL
5 (0%) 0 mL 40 mL
4. Obtain five more 50-mL cups and label them A, B, C, D, and E. Using the graduated cylinder
labeled 1% H2O2, add 40 mL of hydrogen peroxide (the substrate) to each beaker. The reactions
are now ready to run.
5. Using the forceps, obtain ten filter-paper disks. Set them on a dry paper towel.
6. Using the forceps, take one filter-paper disk and immerse it in beaker #1. Allow the disk to
absorb the enzyme solution for 5 seconds. Remove the disk and drain it for 10 seconds on a
paper towel. Drop the disk into beaker A. Observe the disk鈥檚 movement, and note the time
when the disk reaches the surface. Record the time in the Data Table. Convert the time from
seconds into minutes. Also record this in the Data Table.
7. Repeat step 6 for a second trial. Record your results in the Data Table.
8. Repeat the procedure in step 6 using beaker #2 and beaker B. Also run two trials.
9. Repeat steps 6 and 7 using beaker #3 and beaker C. Run two trials.
10. Repeat steps 6 and 7 using beaker #4 and beaker D. Run two trials.
11. Repeat steps 6 and 7 using beaker #5 and beaker E. Run two trials.
12. Calculate the reaction rate, or speed of the reactions. Divide the concentration of the enzyme
(remember to convert from percentage to decimal) by the time it took the disk to reach the
surface.Can you tell me the control,independent variable, and dependent variable for this experiment?
thedependent variable is the rate of reaction becase the it is affected by the different enzymes (the independent variable) i think so anyway didn't read most if the stuff you put up thereCan you tell me the control,independent variable, and dependent variable for this experiment?
the control is the substance that you did not add or do anything to
What do they mean by ';Does this procedure control for variables';?
What does that mean? Control for variables?What do they mean by ';Does this procedure control for variables';?
Can you give a little more explanation about ';this procedure';. Thank you.
Can you give a little more explanation about ';this procedure';. Thank you.
Subscribe to:
Posts (Atom)