a timeline that shows the Earth's history divided into time units based on the significant events occurring at that time
What is geologic time scale?
the physical and chemical properties of rocks constantly changing in a natural, never-ending rotation
What is the rock cycle?
the largest reservoir of liquid fresh water on Earth and is found in aquifers, porous rock and sediment with water in between
What is groundwater?
a method of fishing that involves towing a weighted net across the seafloor to harvest fish
What is bottom trawling?
a liquid fossil fuel that is extremely useful because it can be transported easily and can be used in cars and other vehicles
What is oil?
the remains or traces of once-living organisms preserved in sedimentary units
What are fossils?
*double point* in this solid the atoms are arranged in a pattern
What is a crystal?
the largest types of stream, moving large amounts of water from higher to lower elevations
What are rivers?
Samples of seawater and rocks can be collected directly by scientists in these vehicles
What are submersibles?
*Double Points* any material that can release energy in a chemical change
What is a fuel?
*Triple Points* a method used to establish how old an object is by measuring the amount of radioisotope the object contains against the decay product it contains.
What is radiometric dating?
with more than 700 different types, this rock forms from the cooling and hardening of molten magma in many different environments
What is igneous rock?
the study of bodies of fresh water and the organisms that live there
What is limnology?
the daily rise and fall of sea level at any given place
What are tides?
*Double Points* The solid form is what we know as coal. The liquid form is petroleum, or crude oil. Natural gas is the gaseous form.
What are hydrocarbons?
the subdivisions within eras that span tens of millions of years.
What are periods?
Changes in enormous quantities of rock over a wide area caused by the extreme pressure from overlying rock or from compression caused by geologic processes.
What is regional metamorphism?
shallow wetlands around lakes, streams, or the ocean where grasses and reeds are common, but trees are not (
What are marshes?
created by corals and other animals deposit calcium carbonate
What are reefs?
material that comes from plants and animals that were recently living.Can be burned directly without having to be processed first
What is biomass?
The study of rock layers, or strata, to learn more about the history of the Earth
What is stratigraphy?
form from volcanic gases, sediment formation, oxidation, crystallization from magma, or deposition from a saline fluid, to list a few
What is a crystal?
Chesapeake Bay has the largest in reference to this type of body of water in the United States
What is an estuary?
occurs when the tidal bulges from the Moon and Sun are aligned
What are spring tides?
found in mountain passes where the cooler Pacific Ocean air is sucked through on its way to warmer inland valleys.
What are windmills?