Geologic History
This scientific law states that fossils located in deeper sediment layers are older than ones deposited in layers closer to the surface.
The Law of Superposition
A star and the group of planets and other celestial bodies that are held by its gravitational attraction and revolve around it.
Solar System
This event happens when the Moon fall into Earth's shadow and turns red.
Lunar Eclipse
The force that causes objects with mass to attract one another.
Gravity
The study of rock layers.
Stratigraphy
The mineralized remains of organisms and the rock layers in which they are found.
The Fossil Record
This is the largest object in our solar system.
The Sun
This event happens when the Moon casts a shadow onto the Earth.
Solar Eclipse
The four divisions of the year caused by the tilt of Earth during its revolution.
Seasons
A theory that says the universe began as a small point that expanded rapidly about 13.7 billion years ago.
The Big Bang Theory
Any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time.
Index Fossil
All other objects in the solar system orbit this object because it has the most mass and therefor strongest gravitational force.
The Sun
A solar eclipse can only be seen by people in or near this area on Earth.
The Moon's shadow (or the Path of Totality)
This is the curved path that an object takes as it revolves around another object.
Orbit
The imaginary line through Earth that extends from the North Pole to the South Pole and is the center of Earth’s rotation.
Earth's axis
Beds or layers of sedimentary rock having approximately the same composition throughout.
Rock Strata
The diameter of the Sun is about 100 times more than the diameter of this planet.
Earth
Maryland goes through this season while the Northern Hemisphere is tilted away from the Sun.
Winter
The Moon takes around 29.5 days to complete one cycle of these.
Lunar Phases
The oldest fossils would be found in this rock layer.
The bottom layer
System of chronological measurement that relates stratigraphy to time.
Geological Time Scale
This is reason that a large planet like Jupiter has more than 60 moons.
It has a strong gravitational force
The Moon would most likely do this if Earth's gravity increased.
Move towards or collide with Earth
This force is the biggest influence on the motion of objects in galaxies and solar systems.
Gravity
Studying the fossil record and rock strata can give us information about this.
An area's geologic history