Grade 3 · Science
Plan a fair comparison practice
Change one tested factor while keeping other relevant conditions alike.
Opening your practice adventure…
Try a sample
To compare dissolution at two temperatures, what should be the same?
- the water temperature
- the amount of substance added
- the time to dissolve
- the dissolution rate
See the answer & why
the amount of substance added
Equal quantities help isolate the effect of temperature.
A little hint: Identify the factor being tested and keep the comparison conditions consistent.
A teaching tip
Identify the factor being tested and keep the comparison conditions consistent.