Topic Details (Notes format)

Which element has the chemical symbol "Kr"?

Which vitamin is produced when the human skin is exposed to sunlight?

Which force pulls objects toward the center of the Earth?

Who discovered RNA interference?

Who discovered dark energy?

Who discovered Uranus?

Who discovered the laws of planetary motion?

Which planet has a Great Red Spot?

Which planet is known as the "Morning Star"?

What is the SI unit of electric current?