The cell's basic unit of life; all organisms are made up of one or more cells.
What is Cell Theory?
100
Push or Pull that acts on an object; measured in newtons.
What is Force?
100
Anything that has mass and volume.
What is Matter?
100
Amount of dissolved salts in water.
What is Salinity?
100
Refers to the property of a barrier, such as a cell membrane, that allows only certain substances to pass through.
What is Selective Permeability?
200
The movement of particles from an area of higher concentration to an area of lower concentration.
What is Diffusion?
200
Force that opposes the relative motion of an object.
What is Friction?
200
Measure of how much space a substance takes up.
What is Volume?
200
Upper surface of the groundwater zone.
What is a Water Table?
200
A force of attraction between two objects because of their mass.
What is Gravity?
300
Thin structure that separates an interior environment from it's exterior surrounding.
What is a Membrane?
300
Amount of matter in an object.
What is Mass?
300
Increase in the volume of a substance in response to an increase in it's temperature.
What is Thermal Expansion?
300
Ability of a material to absorb heat.
What is Heat Capacity?
300
The resistance of a fluid to flow.
What is Viscosity?
400
Thin covering that holds the cytoplasm and organelles inside a cell and controls the passage of materials in or out of the cell.
What is Cell Membrane
400
A group of physical parts that interact with eachother and function as a whole in order to complete a task.
What is a Mechanical System?
400
Any substance that flows.
What is a Fluid?
400
Sometimes used to refer to the big ice masses at the poles.
What is a Polar Icecap? (or, just an Icecap)
400
An area where water fills all the air spaces in the soil and tiny cracks in the rock.
What is a Groundwater Zone?
500
A special kind of diffusion in which a fluid (usually water) moves though a selectively pemeable membrane from an area of higher concentration to an area of lower concentration.
What is Osmosis?
500
Amount by which a machine can multiply and input force; determined by the ratio of the output force to the input force.
What is a Mechanical Advantage?
500
Theory that states that all matter is made up of particles.
What is Particle Theory of Matter?
500
Area of land where all the water eventually drains into one main water body, such as a stream, river, wetland, lake, or ocean.
What is Watershed?
500
Technique of using living organisms to clean up contamination in land and water.