Which of the following defines a constant? What happens because of what was added or changed in the experiment
All things that are kept the same in an experiment
What is added or changed in the experiment
Those that were left alone in the experiment or was set as the standard

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of

Need the diagram below, which is not drawn to scale, shows the position of the earth, moon, and sun. what type of eclipse occurs when the earth, moon, and sun are lined up in the order shown? a. planetary eclipse b. solar eclipse c. martian eclipse d. lunar eclipse

Every early childhood education program should develop a