Space
A galaxy that looks like a pinwheel
What is a spiral galaxy?
The shape of the land
What is topography?
Heat transfer through the movement of fluids
What is convection?
A naturally occurring inorganic solid that has a crystal structure and a definite chemical composition
What is a mineral?
A stress force that pulls on the crust, stretching rock so that it becomes thinner in the middle
What is tension?
Round and densely packed grouping of older stars containing more than a million stars
What is a globular cluster?
The height above sea level
What is Elevation?
Movement that results from the change in density when a substance is heated
What is a convection current?
How light is reflected from a mineral's surface
What is luster?
A stress force that squeezes rock until it folds or breaks
What is compression?
A large cloud of gas and dust spread out in an immense volume, the beginning of a star
What is a nebula?
A topographic feature, like a hill or a valley
What is a landform?
Heat transfer when two materials are touching
What is conduction?
A solid with flat sides that meet at sharp edges and corners
What is a crystal?
a fault at an angle in which one block lies above the fault while the other lies below
What is a normal fault?
A contracting cloud of gas and dust with enough mass to form a star
What is a protostar?
The difference between the highest and lowest parts of an area
What is relief?
The part of the mantle where 'plastic rock' is found
What is the asthenosphere?
Molten material inside the Earth
What is magma?
Stress that pushes a mass of rock in two opposite directions
What is shearing?
Extremely bright galaxies with massive black holes at their center that are observed at great distances near the edge of the observed universe
What are quasars?
A map projection that preserves shape and angle but distorts size, especially at high latitudes.
What is a Mercator Projection?
When the ocean floor sinks beneath a deep-ocean trench back into the mantle
What is subduction?
A rock that contains a metal or other useful mineral that can be mined and sold at a profit
What is an ore?
The idea that the tectonic plates once formed a super continent.
What is Wegener's continental drift hypothesis?