English review

Research is ---- because it involves performing steps in a cyclical way.

The ___ (word or phrase) to be defined;

Research is --- because it is based on verifiable evidence, observation, or experiences

The --- of object or concept to which the term belongs;

Research is ---- because it is based on sound principles and systematic procedure

The ----- that distinguish it from all others of its class

Research is --- because it can be repeated by ither researchers as long as its methodology is sufficiently detailed.

A ----- is a one-sentence explanation of the meaning of a word.

Research is -----oriented because it aims to address a particular problem.

A statement of the meaning of a word or word group or a sign or symbol.

(Merriam Webster Dictionary)