Planet Earth
This is the largest ocean on Earth by surface area.
Pacific Ocean
This flightless Antarctic bird is famous for waddling in a permanent "tuxedo.
Penguin
Fluffy white clouds that look like cotton balls are called this.
Cumulus clouds
This planet is known as the "Red Planet" due to iron oxide on its surface.
Mars
This organ pumps blood throughout the entire human body.
Heart
Mount Everest, the highest mountain above sea level, is located in this mountain range.
The Himalayas
This marsupial is native to Australia and spends most of its life sleeping in eucalyptus trees.
Koala
This violent, rotating column of air is often nicknamed a "twister."
Tornado
This closest star to Earth provides light and heat to our solar system.
The Sun
These two bean-shaped organs filter waste products from your blood to make urine.
Kidneys
This continent is the driest, windiest, and coldest on Earth.
Antarctica
This intelligent marine mammal breathes air through a blowhole and uses echolocation.
Dolphin
The center of a hurricane is calm and clear, and is known by this name.
The eye
This icy celestial body features a glowing head and a long tail when it nears the sun.
Comet
This largest internal organ in the human body performs over 500 vital functions.
Liver
The Mariana Trench, the deepest oceanic trench, is located in this specific ocean basin.
Pacific Ocean
This clever bird species belongs to the corvid family and can recognize human faces.
Crow (or Raven)
Measured in millibars, this instrument records atmospheric pressure.
Barometer
This galaxy, our closest major galactic neighbor, is on a collision course with the Milky Way.
Andromeda Galaxy
This complex tissue network handles electrical signals and is commanded by the brain.
Nervous system
Formed by tectonic plate movement, this massive East African valley stretches thousands of miles.
Great Rift Valley
This creature is the only mammal capable of true, sustained flight.
Bat
This optical phenomenon creates a colorful arc in the sky when sunlight hits water droplets.
Rainbow
This term describes the point in a star's lifecycle when a massive star collapses violently.
Supernova
This tiny bone in the middle ear is the smallest bone in the human body.
Stapes