Geography
This 1,300-kilometer-long transform fault in California marks the boundary between the Pacific and North American Plates.
San Andreas Fault
This is the process by which plants get energy
Photosynthesis
This African animal is the largest land animal on Earth
Africa Elephant
This is the largest ocean on earth
The Pacific Ocean
For thousands of years, humans have burned this most common form of biomass.
Wood
This U.S. state is the most prone to earthquakes
Alaska
This part of the plant makes food using sunlight, air, and water.
Leaves
A group of these birds is called a "murder".
Crows
This is an important environmental event that takes place annually on April 22.
Earth Day
The prefix "hydro" in hydropower comes from the Greek word for this.
Water
This continent has land in all four hemispheres
Africa
This is the fastest-growing plant in the world.
Bamboo
This animal is largest rodent in the world
Capybara
By volume, this gas makes up about 78% of Earth's atmosphere
Nitrogen
It takes approximately this many minutes for light to travel from the sun to Earth.
8 minutes
A massive 2025 landslide in an uninhabited area generated a "mega tsunami," a type of event scientists say is increasing due to the thawing of this frozen ground.
Permafrost
This is the largest seed in the world.
Coco de mer (Lodoicea maldivica)
This deep-sea creature has three hearts, blue blood, and can squeeze through any opening larger than its beak.
Octopus
Scientists use triangulation to locate this, the point on the Earth's surface right above a seismic event
Epicenter
This country is the world's largest producer and installer of renewable energy by total volume
China
In 2025, geochemists discovered the deepest known ecosystem of organisms surviving on methane rather than sunlight in a trench between these two regions.
Russia and Alaska
This plant, known as the "oldest tree," is 4,850 years old.
Methuselah (Great Basin bristlecone pine)
This animal is considered the strongest animal in the world relative to its body weight
Dung Beetle
Of 20, 30 or 50%, the percentage of the Earth's land Asia occupies as the world's largest continent.
30%
This country has the highest per capita renewable energy use
The Netherlands