Which of the following is not a major concept involved in the study of earth science?
a. earth’s history
b. the structure of the earth system
c. earth in the solar systems.
d. all are major concepts

What must happen for new french words to be published in official dictionaries? a. they must be approved by the french academy b. they must be voted on by the people of france c. they must be used by famous french writers d. they must be used by philosophers a. they must be approved by the french academy