Chapter 2: Planet Earth

A body that orbits a larger body.

The path an object takes around a central object.

The days when the Sun's vertical rays are farthest from the equator.

The line of latitude located 66.5 degrees North of the Equator.

The line of latitude that is located at 66.5 degrees South of the Equator.

The Sun and the objects that move about it, including: planets, moons, and asteroids.

The line of latitude that is 23.5 degrees North of the Equator.

One complete spin around an axis.

One complete orbit around the Sun. (24 hours or 1 day)

An imaginary line that runs from the North pole through Earth's center to the South Pole.

The two days of the year when the Sun's rays strike the equator directly.

A form of oxygen is the atmosphere that helps protect Earth from harmful solar radiation.

Water the gaseous form.

The circulation of water from Earth's surface of the atmosphere and back.

The shapes on Earth's surface.

A nearly flat area on Earth's surface.

An elevated flatland on Earth's surface.

A neck of land connecting two larger land areas.

Land bordered by water on three sides.

The theory that Earth's surface is divided into several major, slowly moving plates or pieces.

The inner, solid part of Earth.

The liquid layer that surrounds Earth's core.

Melted rock in the upper mantle of Earth.

The outer, solid layer of Earth.

Magma that has broken through the crust to Earth's surface.

Earth's large landmasses.

The movement of one of Earth's heavier tectonic plates underneath a lighter tectonic plate.

Sudden, violent movement along a fraction within Earth's crust.

A fractured surface in Earth's crust where a mass of rock is in motion.

Earth's single, original supercontinent from which today's continents were separated.

The process of breaking rocks into smaller pieces through heat, water, or other means.

The movement by water, ice, or wind of rocky materials to another location.

A fan-shaped landform created by deposits of sediment at the base of a mountain.

A landform of level ground built by sediment deposited by a river or stream.

Landforms created by the deposits of sediment at the mouths of rivers.

Large, slow-moving sheets or rivers of ice.