Topic Details (Notes format)

Which element has the chemical symbol "Gd"?

Which monarchy in southwestern Europe is ruled from Madrid?

Which organ in the body filters waste from the blood to produce urine?

Which hormone, secreted by the pineal gland, regulates the sleep-wake cycle?

Which element has the chemical symbol "Te"?

Which is the smallest planet in the solar system since Pluto’s reclassification?

Which sea is the world’s largest inland body of water, located between Europe and Asia?

What is the deepest known point in the Earth’s oceans?

Which element has the chemical symbol "Bk"?

Which dynasty built the Great Wall of China?