id	keyword
ccsj-170	colors
ccsj-170	light
ccsj-170	misconceptions
ccsj-170	teachers
ccsj-170	knowledge
ccsj-170	children
ccsj-170	learning
ccsj-170	mixing
ccsj-170	science
ccsj-170	red
ccsj-170	source
ccsj-170	blue