a natural or artificial object in space that circles around another object. Can be used to find weather, land conditions, water conditions, water depth.
A device that determines the distance of an object under water by recording echoes of sound waves
The ability of a fluid to put an upward force on an object placed in it
the portion of earth that is water
able to be shaped or bent
The likelihood that each individual may have different reactions to medicines or chances of getting a certain disease.
change that produces new substances or changes the identity of a given substance
the amount of matter in a given space
Vertical column of elements in the periodic table that have similar properties
horizontal row of elements in the periodic table
a jellylike fluid inside the cell in which the organelles are held
powerhouse of the cell that turns food into energy
a part of the cell containing DNA and RNA and responsible for growth and reproduction
a tiny, nonliving particle that invades and then reproduces inside a living cell
substance prepared from killed or weakened pathogens and introduced into a body to help the body learn to fight disease.
The loss of one thing for the gain of another. Involves a gain or loss of money.
The 'skin' on the surface of water formed as a result of polarity in water molecules.
a molecule (like water) that has charged ends
non-point source pollution
water pollution that does not have a specific source
pollution that enters water from a known source, like a factory
a material's ability to allow heat and electricity to flow through
amount of heat required to increase the temperature of a substance
single-celled eukaryotic organism that is either plant-like, animal-like, or fungus-like
Movement of cold, nutrient-rich bottom water to the ocean's surface. Usually occurs along coastal areas.
conservation of mass
the principle stating that matter is not created or destroyed during a chemical reaction
a chemical used to kill pests (as rodents or insects)
a change in a substance that does not involve a change in the identity of the substance
The process of sending scientists into places seen on satellite images to check the information about the area.
Any agent that can cause a change in DNA
A form of technology that uses living organisms to modify products for specific purposes.
process of making changes in the DNA code of living organisms
basic unit of matter, made up of protons, neutrons, and electrons
The pattern of overlapping food chains in an ecosystem
A habitat in which the fresh water of a river meets the salt water of the ocean.
geologic time scale
a record of the geologic events and life forms in Earth's history
a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found
method of determining the age of a fossil by comparing its placement with that of fossils in other layers of rock
A technique used to determine the actual age of a fossil
where there is gap in the rock layers
compound that blocks the growth and reproduction of bacteria
measurement of strength of drug
risk, particularly of being exposed to disease or toxin
Microscopic, free-floating, organisms in the ocean that create food from sunlight
the ability of one substance to dissolve in another
the property of molecules of different substances sticking together
tendency of molecules of the same kind to stick to one another
A unicellular organism that lacks a nucleus and membrane bound organelles
A cell that contains a nucleus and membrane bound organelles
the gradual change in a species over time, often due to natural selection
process where individuals that are better adapted to their environment survive and reproduce most successfully; also called survival of the fittest