1) What is a photon? a) Light particle b) Sound wave c) Water molecule d) Air particle 2) Photons are considered as: a) Quanta of light b) Atoms c) Cells d) Molecules 3) Do photons have mass? a) Yes b) No c) Sometimes d) Rarely 4) What is the speed of photons in a vacuum? a) 300 km/s b) 300,000 km/s c) 3,000 km/s d) 30 km/s 5) Photons are emitted during: a) Evaporation b) Condensation c) Electron transitions d) Boiling 6) Which color of light has the highest energy photons? a) Red b) Green c) Blue d) Yellow 7) Photons can be: a) Absorbed b) Reflected c) Transmitted d) Ignored 8) In which phenomenon do photons play a major role? a) Photosynthesis b) Digestion c) Respiration d) Circulation 9) Photons are always in motion at: a) Any speed b) Light speed c) Sound speed d) Variable speed 10) Which statement is true about photons? a) Have infinite mass b) Travel in straight lines c) Are only in sunlight d) Cannot be detected

Understanding Photons

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