Memory Game Unit 2 Selection2 VocabularyOnline version For use with the NatGeo ESOL Text by Melanie McCrae a model of the Earth amount resource the total number of quantity crops globe something that people need and use. depend when you depend on something you need it; require the total rain , snow or sleet that falls in a period of time materials rainfall things you need to make a produce or to do a project something that is living plants that farmers grow alive