Water Science!
Environmental!
Planetary!
Earth Geology!
Paleo!
100
What percentage of Earth's water is fresh water?
3%
100
What is the main ingredient in compost?
Food scraps
100
What is the primary reason Saturn is so easily recognizable in the night sky?
Its rings!
100
If you lick a certain mineral, it tastes salty. Which one is it?
Halite
100
What’s the closest living relative to a T. rex?
Chickens
200
What do we call the underground layer of water-bearing rock?
Aquifer
200
What is the name of the process where plants absorb carbon dioxide and release oxygen?
Photosynthesis
200
What is the dominant surface feature on Mercury?
Craters
200
Which natural disaster is basically the Earth “burping”?
Volcanic Eruption
200
What type of rock is most likely to contain fossils?
Sedimentary
300
What is the largest source of fresh water on Earth?
Hint: Name the geological formation
Glaciers and Ice Caps
300
What element causes the green color in the Northern Lights?
Oxygen atoms
300
Name a classic mnemonic device to remember the order of the planets
My Very Educated Mother Just Served Us Nachos
300
What type of rock is the famous “marble” used in the Parthenon and the Lincoln Memorial?
Limestone
300
What was the dominant predator in Earth's oceans before sharks and marine reptiles took over?
Eurypterids: "Sea Scorpions"
400
What is the largest river by volume in the world?
Amazon
400
Which planet has the highest concentration of greenhouse gases in its atmosphere?
Venus
400
What moon has lakes and rivers made of liquid methane?
Titan
400
Which U.S. state is home to the most active volcanoes?
Alaska
400
Which period is known as the "Age of Fish" because of the explosion of marine life?
Devonian
500
Which ocean is the smallest and shallowest?
Arctic
500
What animal is often used as a symbol for environmental conservation?
Panda
500
What gives Neptune its distinctive blue color?
The planet's atmosphere is filled with methane, which absorbs red light and reflects blue light.
500
The Alter of Sacrifice is a Navajo Sandstone mountain in Zion National Park. What is the mineral that makes the rock appear red. 
Hematite (iron oxide)
500
Which fossil provided the first definitive evidence of feathers in non-avian dinosaurs?
Archaeopteryx