Chemistry
What is acid
pH of less than 7
What is the Water Cycle
the journey water takes as it circulates from the land to the sky and back again
What is disease
any change that disrupts the normal function of one or more body systems.
Relative dating
determining the age or order of things from the past or past events without knowing or calculating the actual age
What is Abiotic
A non-living feature of an ecosystem (rock, water, sun, etc.)
What is base
pH of more than 7
What is an auquifier
a body of rock that can contain water or allow water to flow through it
What is infectious disease
any disease that is caused by a pathogen.
what is uranium
radioactive heavy metal that is an abundant source of nuclear energy that has 14 known isotopes used in radioactive dating
What is biotic factor
A living feature of an ecosystem (plants, animals, leaves, etc.)
substance that increases the rate of a chemical reaction
What is permability
measure of how much water can flow through a substance
What is microbe
any organism or near life form that cannot be seen with the naked eye.
what is geology
the study of the rocks, processes, and history of Earth
what is population
a group of individuals of one species in an area
do not change the composition of a substance, only the physical properties
a freshwater stream that feeds into a larger stream, river or other body of water.
What is bacteria
microscopic living organisms, usually one-celled, that can be dangerous (cause infection) or beneficial (such as in fermentation and in decomposition).
What is extinction
the complete elimination (dying out) of a species due to the species inability to survive and therefore adapt to its environment.
what is commensalism
an association between two organisms in which one benefits and the other derives neither benefit nor harm.
What is Precipitate
a solid substance formed when two solutions are chemically combined.
What is a river basin
an area of land drained by a river and its tributaries much like a bathtub catches all of the water that falls within its sides
What is unicellular
consisting of a single cell
what is law of superposition
states that in undisturbed rock layers that newer layer will be deposited over older layers
What is mutualism
a relationship between two species of organisms that both benefit from the relationship