Earth & Space
This shimmering star is the center of our solar system and provides thermal energy. Its surface can burst with flares that interfere with radar.
This large triangle was constructed in ancient Egypt as a tomb for a ruler. Thousands of workers labored to stack these heavy, square stones.
What is a pyramid?
This invisible gas makes up nearly twenty percent of the air we breathe. It is required for fire to burn and for our bodies to perform work.
What is oxygen?
This particular type of rock is formed when layers of dirt and shells are pressed together. Over years, it hardens and records history through buried fossils.
Sedimentary Rock
This early explorer sailed far across the Atlantic in search of a shorter trade route. He incorrectly reported that he had reached the territory of India.
Who is Christopher Columbus?
This harder outer layer of the Earth is broken into large tectonic plates. It floats on top of a churning, warmer mantle made of molten rock.
What is the crust?
This ancient empire built sturdy roads and large amphitheaters across territories in Europe. Their senators wore purple garments to assert their power and importance.
What is the Roman Empire?
This cellular organelle is referred to as the powerhouse because it generates energy. It converts nutrients into a form the cell can use for work.
What are mitochondria?
This mathematical term refers to the border or perimeter of a perfect circle. To calculate it, you must multiply the diameter by pi.
What is Circumference?
This scaly predator is a modern reptile that resembles an ancient dinosaur. It lurks in murky water and waits near the shore to surprise its prey.
What is an alligator?
This instrument measures air pressure to help forecasters predict the weather. When the reading drops, a storm is certainly near.
What is a barometer?
This Greek philosopher was a teacher to Alexander the Great and studied biology. He categorized creatures based on shared characteristics and patterns.
Who is Aristotle?
This structure in a flower produces pollen to further the process of germination. It is carried by workers like bees or by a stiff breeze.
What is a stamen?
This force occurs when two surfaces rub together and convert motion into heat. It can be reduced by using a lubricant like butter or motor oil.
What is Friction?
This dry desert covers a large portion of Northern Africa. It is scorched by the sun and has very sparse water for travelers.
What is the Sahara?