The rock cycle [videorecording]. 

 - Quezon City :  Felta. 
 - 1 videodisc (20 mins.) 
 - Earth Sciences Video Library .
<br/><br/> Grade 7-12 
<br/><br/> Understand the complex process that create, change and bra 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrology.<br/>Geochemical cycle.