Sustainable energy sources. Play Renewable Energy trivia solo to sharpen your knowledge, or challenge a friend head-to-head in Trivia Tango — every question comes with an explanation so you learn as you play. Questions span every level, from easy warm-ups to expert-level stumpers, so there's a real challenge here however much you already know.
A mix of easy, medium and hard — questions run from warm-up to expert, so there's a real challenge at every level. Think you know the answers? Play to find out.
Organic materials like wood chips, agricultural waste, and plant matter used to generate energy are collectively called this.
Difficulty: EasyThis physical law limits the maximum theoretical efficiency of wind turbines to approximately 59.3%.
Difficulty: MediumThis theoretical limit, named after two Bell Labs researchers, caps the maximum efficiency of a single-junction solar cell at about 33%.
Difficulty: HardThis renewable energy taps into heat stored beneath Earth's surface to generate electricity or provide direct heating.
Difficulty: EasyThis type of geothermal system uses the constant temperature of shallow ground for heating and cooling buildings.
Difficulty: MediumThis advanced n-type silicon cell technology uses a thin tunnel oxide layer with doped polysilicon for superior passivation.
Difficulty: HardRooftop installations that convert sunlight directly into electricity for homes are commonly called these panels.
Difficulty: EasyThis South American country generates over 75% of its electricity from hydropower, anchored by the massive Itaipu Dam.
Difficulty: Medium