Suppose a biologist wants to investigate the effect of a hormone on egg production in chickens. one group of chickens will receive no hormones treatment. other groups of chickens will receive different amounts of the hormone. for all groups, all other conditions, such a kind and amount of food, feeding time, amount of water, and temperature will be identical.
control group:
experimental variable:
experimental group:
list three control variables:

Which of the rock examples below is most likely to be metamorphic

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

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.