Science Buddies: "Ask an Expert"

Can we use years or days as manipulated variable in an experiment.

For example:
The table below shown the number of turtle left from year 2000-2005.

year | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 |
the number of turtle left 500 450 400 350 300 250

Hi moghaz76,

Yes, years (time in general) is fine to use as the manipulated (independent) variable.

Here's some more information about variables that you might find useful:
https://www.sciencebuddies.org/science- ... bles.shtml

Since you are in high school, our regular and Advanced Project Guides might also be useful to you:

Regular Guide:
https://www.sciencebuddies.org/science- ... ndex.shtml

Advanced Guide:
https://www.sciencebuddies.org/science- ... ndex.shtml

Let us know if you have more questions!