Chan-ju and lucas are researchers studying consumer behavior. chan-ju goes to a store and watches the shoppers for several days. she takes very careful notes about what she sees the shoppers doing, but she does not talk to the shoppers or interact with them in any way. lucas goes to a store and asks each shopper a series of questions. he makes sure to ask these questions of each shopper in the store. chan-ju's study is an example of a(n) and lucas's study is an example of a

naturalistic observation; survey                                              

Explanation:

Naturalistic observation: In psychology, the term naturalistic observation is defined as a research method that is being used by social scientists and psychologists. The psychologists who are conducting the naturalistic observation generally observe the participants in their natural environment.

Survey: In psychology, the term survey is defined as one of the research methods that involve collecting data from the participants being studies by asking various questions in person, phone, paper, or online.

In the question above, Chan-ju's study is an example of naturalistic observation and Lucas's study is an example of a survey.

giant impact theory - the moon was formed from the collision between earth and another mars-sized body.

colliding planetesimals hypothesis - the moon was formed from the same cloud of material as earth.

capture hypothesis - the moon was locked into orbit by earths gravity as it was passing by it.

accretion hypothesis - the moon was formed from collisions and combining of planetesimals.

i think this is right, if not and you know better let me know.

answer; nonpartisan election;