Experiment is a type of Inquiry. Experiment is related to Testing. Testing is a form of Test. Test is related to Pop. 
Crop is related to Rice. Rice is related to Field. Field is related to Home. 
Inquiry <--IsA-- Experiment <--RelatedTo--> Testing --FormOf--> Test <--RelatedTo--> Pop 
Crop <--RelatedTo--> Rice <--RelatedTo--> Field <--RelatedTo--> Home 