What are the building blocks of proteins?

Why do scientists classify climates according to precipitation instead of relative humidity?

Why does air pressure decrease from the troposphere to the exosphere

This word for a bug or malfunction was popularized in the 1962 book into orbit by the mercury astronauts

Which of the timelines above correctly shows the order of historical events on the African continent?

A rooster lays an egg on a roof, The egg rolls down the side of the house and lands in the Neighbors yard, whose egg is it?

Which statement about the economy of France is not true? Paris is a major manufacturing center. Marseille is a busy seaport on the Mediterranean coast. Farming is the major activity in the Alps. World-famous wines are produced in the Bordeaux region.

What is agreed upon by scientist as the most likely cause of the final extinction for the dinosaurs?

As a result of a mountainous terrain, all of the following occurred except: A independent Greek city-states arose B large empires developed C trade and outdoor markets developed D outdoor civic life flourished

Why do cities form and how have they affected culture?

Why is india called the world's largest democracy