Aclass of third graders is told that the assistant principal will be visiting their class to confirm their teacher's reports of bad behavior. when the principal visits, the students behave perfectly. this is an example of

This is an example of "The Hawthorne Effect".

The Hawthorne effect which is likewise alluded to as the observer effect is a sort of reactivity in which people change a part of their conduct in light of their consciousness of being watched. Like in this case the students knew they are going to be observed so they modified their behavior.

jupiter is mainly composed of hydrogen and helium just like a star. spectral analysis of jupiter has revealed that in addition to hydrogen and helium, the planet is made of water, methane and ammonia. those elements are in trace amounts. the core of the planet is thought to contain some rock and metallic hydrogen. i hope this will give you the answer to your question! : d

answer; they are called (pebbling);