In the same science fair, tina ask the question "does caffeine increase the heart rate of an earthworm? " in test 1,she measures the heart rate by looking at the earthworm under a microscopes, the heart rate if 50 beats per minute. in test 2,she places a few drops of caffeine on the earthworms skin and measures the rate again. in this test the heart rate is 68beats per minute
what is the independent variable in this experiment
what is the dependent variable in this experiment
tina's experiment should have included a hypothisis .in a complete sentence, suggest a hypothesis for tina's experiment

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .