In an undisturbed layer of rocks, the oldest layers will always be at the bottom.

(a)  

A symbiotic relationship where both species benefit.

(a)  

A symbiotic relationship in which one species benefits and one species gets NOTHING (meaning no benefit, no harm)

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An organism that makes its own energy (usually from the sun) You only have to type ONE of the two possibilities.

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An organism that must eat other organisms to survive. Can NOT produce its own energy. (Only type one of the two possible word choices, do not combine them)

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An organism that breaks down dead stuff.

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The LIVING parts of an ecosystem

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The NON-LIVING parts of an ecosystem.

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The process through which plants turn carbon dioxide into oxygen. (1 word)

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Subatomic particles with a POSITIVE charge.

(a)  

Subatomic particles with a NEUTRAL charge.

(a)  

Subatomic particles with a NEGATIVE charge.

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Number of Protons in an atom (also equals the number of electrons). Example: Hydrogen's is 1

(a)  

Protons + Neutrons =

(a)  

A mixture in which you CAN see the different parts.

(a)  

A mixture in which you CAN NOT see the different parts.

(a)  

A common fossil found in many areas from a specific time; used to help identify the age of other formations.

(a)  

Method of determining the age based on measuring radioactive elements (2 words, second word is Dating)

(a)  

Determination of the age of a rock based on the surrounding evidence.

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The area of land where surface water drains when the ground is unable to absorb it.

(a)  

The amount of salt within a solution.

(a)  

Underground rock layer that contains a vital source of water for human consumption and use.

(a)  

Oxygen found in a body of water; measurements may be used to indicate the health of a body of water. (2 words)

(a)  

A measure of how suitable water may be drinking.

(a)  

A process that occurs when less-dense surface water is drawn away from shore by currents and replaced by COLD, NUTRIENT RICH WATER from below.

(a)  

A change in the PHYSICAL properties of a substance which is usually reversible (Freezing, melting, cutting, tearing)

(2 words)

(a)  

A chemical reaction involving the rearrangement of the atoms of one or more substances; causes a change in its chemical properties or composition. (2 words)

(a)  

A chart illustrating chemical elements that compose all physical matter; listed by atomic numbers and related groups. (2 words)

(a)  

A chemical substance composed of two or more atoms of different elements, chemically bonded (1 word)

(a)  

Cloudy or opaque; due to stirred up sediment or particles in the water.

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Beneficial Trait that allows an organism to be better suited for survival and reproduction.

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"Survival of the Fittest" - states that organisms best suited for survival are the ones that successfully reproduce and pass on their genes. (2 Words)

(a)  

Field of study using living organisms to help manufacture medicine or other beneficial technologies.

(a)  

Using biotechnology techniques to solve environmental problems.

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Science of studying disease-causing microorganisms (bacteria, viruses, fungi, etc...)

(a)  

Any disease-causing microbe.

(a)  

Nonliving pathogen that is capable of infecting and reproducing within living hosts; may spread rapidly through population.

(a)  

Unicellular prokaryotic organisms found nearly everywhere on Earth; capable of living in a variety of areas or conditions.

(a)  

A symbiotic relationship in which one organism benefits and one is harmed.

(a)  

A series of feeding levels representing the flow of energy and transfer of matter in an ecosystem.

(a)  

A rapidly spreading outbreak of disease affecting many large populations (BUT NOT GLOBAL YET)

(a)  

A rapidly spreading outbreak of disease affecting widespread regions of the world.

(a)  

System of interactions between organisms ON LAND (2 words)

(a)  

Aquatic system of interactions between organisms in saltwater (2 words)

(a)  

The area at the mouth of a river where its current meets the ocean; contains brackish (part fresh/part salt) water; acts as a marine habitat, buffer for pollutants (a)  

The area of land drained by a river and its branches (2 words)

(a)  

A species that helps scientists determine if an area is ecologically healthy. (1 Word)

(a)  

A graphic organizer that shows the flow of energy through an ecosystem; energy is reduced by 90% as you move up...

(2 words)

(a)