Variable
A+ Only one variable is changed at a time.
-limitation of time -Human limitations -Systematic limitations -random limitations limitations really depend on the experiment your doing. just write things that didn't go as planned in the experiment and could have changed the outcome.
0 degrees celsius
The start time begins when H2O2 (solution B) is added to solution A. The end time is when the solution turns a deep blue color. (This will only take a few seconds.)
It is impossible to tell how long from the start of the experiment it was before all of the substance turned into a liquid without more information about the experiment. Perform the experiment again and use a timer to determine the length of time required to turn the substance into a liquid through heating.
a controlled experiment
a controlled experiment
controlled experiment
a controlled experiment
a controlled experiment
A+ Only one variable is changed at a time.
Controlled
You can only change ONE at a time. That's what makes it controlled. It's the only sure way to know what actually changed the experiment.
It's called a controlled experiment.
A controlled experiment.
Controlled experiment
this is an experiment that only one varible is manipulated at a time