I Think I Know
Layers of Truth
How Does the Heat Get There?
I've Got A Theory
Stay Within the Boundary
100
Rock samples provide THIS KIND of evidence about Earth's interior.
What is DIRECT EVIDENCE?
100
I may not need sunscreen, but I am like the SKIN of the Earth.
What is the CRUST?
100
It's when heat moves from one place, or thing, to another.
What is HEAT TRANSFER?
100
He had an hypothesis...a continental jigsaw puzzle!
Who was ALFRED WEGENER?
100
New crust is created, underwater, by this process.
What is SEA-FLOOR SPREADING?
200
You might think you were "sailing" when earthquakes let you make these recordings.
What are SEISMIC WAVES?
200
Earth's crust is mostly this kind of igneous rock, which holds up the oceans.
What is BASALT?
200
You can't really see this kind of heat transfer, but you've heard of, or had, sunburn!
What is RADIATION?
200
It means, "All the Land!" not something you use for cooking.
What is PANGAEA?
200
You used to call it Continental Drift, before you knew about convection currents in the mantle.
What is PLATE TECTONICS? (The Plate Tectonic Theory)
300
Seismic waves give us THIS KIND of information about Earth's layers.
What is INDIRECT EVIDENCE?
300
Without my upper and lower parts interacting with each other, Earth's crust would not change very much.
What is the MANTLE?
300
Hot fluids rise, cold fluids sink...you've got me going in circles!
What are CONVECTION CURRENTS?
300
Wegener said this happened over millions of years, sliding across the ocean floor.
What is CONTINENTAL DRIFT?
300
Denser crust moves under less dense crust in this process.
What is SUBDUCTION?
400
Partly made of two layers, its name means "round stone."
What is the LITHOSPHERE?
400
OUT or IN, somehow we are always at the center of things!
What are the OUTER and INNER CORES?
400
Now I'm really touched...only direct contact causes this.
What is CONDUCTION?
400
Finding these same ones in unlikely places was some proof of Wegener's theory. (And they used to be alive!)
What are FOSSILS?
400
Apart and away, or together and toward, tectonic plates can move at these, two places.
What are DIVERGENT and CONVERGENT BOUNDARIES?
500
Part of an Earth's layer, I'm solid, but can bend!
What is the ASTHENOSPHERE?
500
Some say I'm "pushy!" The deeper you go, the greater I get!
What is PRESSURE?
500
Partly because of changes in this, mass divided by volume, convection currents occur.
What is DENSITY?
500
"Mine, oh mine!" Patterns of these also supported the idea of a Pangaea.
What are COAL DEPOSITS?
500
A little up, a little down, or side-by-side slip-sliding away, tectonic plates can move here, too!
What is a TRANSFORM BOUNDARY?
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