Astronomy
The sun's rays strike Earth most directly along here.
What is the equator?
This layer of the earth forms 80 percent of Earth's total volume.
What is the mantle?
In determining climate, these are the two most important factors.
What is temperature and precipitation?
This type of ion is characterized by its positive charge.
What is a cation?
The layers of membrane protecting the brain and spinal cord.
What is the meninges?
This is the 8th planet from the Sun, and is made of mostly hyrdrogen, helium, and methane gas.
What is Neptune?
All of Earth's continents were once joined as this single massive supercontinent.
What is Pangaea?
The 5 main oceans.
What is the Arctic, Atlantic, Pacific, Indian, and Antarctic?
Water molecules do this movement when cooled.
What is expansion?
Chemical digestion starts here.
What is the mouth?
This is the lander craft that within the last decade brought two rovers to Mars to investigate.
What is The Phoenix?
The temperature of the Earth's core.
(Approximate in the thousands)
What is 10,000 to 11,000 F?
The native plant Prairie Dock has thick leaves that prevent other plants from growing in its shadow, an example of this ecological interaction.
What is amensalism?
If a chemical compound's name ends in '-ate' as in 'calcium carbonate' it contains this common element.
What is oxygen?
A normal adult human has this many teeth.
What is 28 teeth?
In 2008, this astronomer for whom a space telescope is named was honored on a U.S. postage stamp.
Who is Hubble?
The movement of water through rock/soil.
What is percolation?
This tree species is the oldest living tree in existence reaching an age of 5000 years old.
What is the bristlecone pine?
The most abundant noble gas in the atmosphere.
What is argon?
These hard lumps form at the back of the throat from hardened material.
What is tonsil stones?
A probe designed to study Halley's Comet was one of the many casualties of this 1986 space program disaster.
What is the Challenger disaster?
This continent is the flattest of all the continents.
What is Australia?
Its ions can take 20,000-100,000 years to move in the ocean making it the slowest biogeochemical cycle. (Hint: Water, phosphorus, nitrogen, carbon, etc.)
What is the phosphorus cycle?
This English chemist and physicist discovered hydrogen.
Who is Henry Cavendish?
These organs aid in chemical digestion but do not move food as it is digested.
What is an accessory organ.