Geologic Time
The preserved remains of ancient life.
What is a fossil?
The shallow area near a continent.
What is the continental shelf?
Cause of tides.
What is Moon's Gravity?
Layer where weather occurs. Lowest atmospheric layer.
What is the Troposphere?
The boundary between two AIR masses.
What is a Front?
The Earth is how old.
What is 4.6 billion years?
Deepest part of the ocean floor.
What is a Deep-ocean Trench?
Energy moving through water.
What is a wave?
The layer that contains the Ozone Layer.
What is the stratosphere?
Water Vapor cools and changes into liquid water.
What is Condensation?
Fossils from organisms that lived during a short period but were widespread.
What is an Index Fossil?
A long underwater mountain chain. Tectonic plates are moving apart.
What is Mid-Ocean Ridge?
The regular rise and fall of ocean water.
What is Tide?
The layer containing auroras. ex. Northern Lights
What is the Thermosphere?
The weight of the air pressing down on Earth. Higher near Earth's surface. Decreases with altitude.
What is Air Pressure?
Determines whether rocks are older or younger than other rocks. Does NOT give an exact age.
What is Relative Dating?
A large, flat area on the deep ocean floor. One of the flattest places on Earth.
What is an Abyssal Plain?
A continuous movement of ocean water. Moves warm and cold water around Earth.
What is an Ocean Current?
Outermost layer. Satellites orbit here.
What is the Exosphere?
Condition of the atmosphere at a specific time.
What is weather?
Determines the ACTUAL age of a rock or fossil. Uses radioactive isotopes in rocks,
What is Absolute Dating?
The steep drop from the continental shelf to the deep ocean floor.
What is the Continental Slope?
Current that warms Western Europe.
What is the Gulf Stream?
The gas making up 78% of the atmosphere.
What is Nitrogen?
Two air masses meet but neither moves. Can cause several days of cloudy, rainy water.
What is a Stationary Front?