question: light:refraction:water
choices.label: A B C D
choices.text: green leaf:photosynthesis:chlorophyll water vapor:condensation:glass computer:calculate:data ocean:ocean current:typhoon
explanation: "refraction" is what happens with "light" in "water", "light" is the main body, "water" is the medium, and "refraction" is a physical change. "photosynthesis" can only be carried out under the action of "green leaves" under the action of visible light. to complete "photosynthesis", "chlorophyll" must exist, but "photosynthesis" is a chemical change. "condensation" is when "water vapor" occurs in "glass", "water vapor" is the main body, "glass" is the medium, and "condensation" is a physical change. the "computer" can "calculate". "ocean current" is the large-scale movement of sea water along a certain path, "ocean current" is not a physical change.
relation: light refraction R4.1
relation: water vapor condensation R4.1
relation: computer calculate R4.1