Practice your trivia skills: Science & Nature
CategoriesScience & Nature
76. How many types of quarks are there in the standard model of physics?
6
3
2
4
77. How many officially recognized dwarf planets in the solar system are named after Polynesian deities?
0
2
1
5
78. Who developed the first successful polio vaccine in the 1950s?
Frederick Robbins
John F. Enders
Thomas Weller
Jonas Salk
79. Who made the discovery of X-rays?
Albert Einstein
Wilhelm Conrad Röntgen
Thomas Alva Edison
James Watt
80. Dry ice is the solid form of what substance?
Ammonia
Carbon dioxide
Oxygen
Nitrogen
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