Weather
Rocks
Hydrosphere
Solar System
Lithosphere
100

A rotating column of air that forms on a clear sunny day

What is a dust devil?

100

The process by which the three basic types of rock can be converted into one another.

What is the Rock Cycle?

100

Rising and falling of an ocean, twice a day

What are tides?
100

A small rocky body that orbits the sun

What is an asteroid?

100

The crust under the ocean

What is oceanic crust?

200

Cold air moves into an area occupied by a warmer air mass

What is a Cold Front?

200
Rock formed from small particles accumulating and then sticking together

What is sedimentary rock?

200

The measure of how much salt is dissolved in water

What is salinity?

200

Having the earth at the center

What is geocentric?

200

A fracture between two rocks that allows the rocks to move relative to each other.

What is a fault?

300

The point in a body's orbit when it is closest to the sun

What is perihelion?

300

Rock formed from the freezing of magma or lava

What is Igneous Rock?

300

A slow-moving mass of ice caused by the accumulation of snow

What is a glacier?

300

Pluto is no longer a planet. What is it now classified as?

What is a dwarf planet?

300

The deep flat part of the ocean that covers more than 50% of the earth's surface.

What is the abyssal plain?

400

The day at which the sun reaches its maximum or minimum height in the sky

What is a Solstice?

400

A distinct separation between two rock strata

What is a bedding plane?

400

A state of balance between opposing actions

What is equilibrium?

400

A belt of icy bodies just beyond the orbit of Neptune

What is the Kuiper Belt?

400

The theory that at one time the continents were all part of a single land mass or continent.

What is Pangaea?

500

A measure of how much light is reflected from a surface instead of being absorbed

What is albedo?

500

Extinct marine arthropods found in some sedimentary rocks.

What is a trilobite?
500

A tide in which the sun's gravity fights the moon's gravity, reducing extremes.

What is a neap tide?

500

The process by which two nuclei come together to form a single, larger nucleus. 

What is nuclear fusion?
500

The study of magnetic properties of rocks that were determined by the magnetic field of the earth at the time they were formed.

What is paleomagnetism?