<http://webisa.webdatacommons.org/124898952>	<http://www.w3.org/ns/prov#value>	"Prior to this activity, students should understand that sound is a form of energy that travels in invisible waves." .
<http://webisa.webdatacommons.org/124898952>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/124898952>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<discoveryeducation.com> .
<http://webisa.webdatacommons.org/prov/205135034>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/124898952> .