The independent variable is the only factor that a scientist varies for different groups in an experiment.
measures in an experiment.
keeps constant for each group in an experiment.
records throughout an experiment.

When organisms convert from of energy, what usually results

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

Aplant may open end close its stomata to prevent excess water loss and maintain