TERMS

BUT DO YOU UNDERSTAND WHAT THESE TERMS really MEAN?

Terms

Unit 1A Vocabulary List

(from Juliet's blog)

Filtration- process where solid particles are separated from a liquid by passing the mixture through a funnel (holds back the solid particles and allows the liquid to pass through)

Filtrate- liquid collected after it has been filtered

Percent recovery- percent of the original foul water sample that recovered as purified water

Purified water- water in its most natural, or clean state

Histogram- graph showing the data that different groups collected in a lab experiment

Range- the difference between the largest and smallest numbers in a data set

Average- sum of all values divided by the sum of the total number of values (also referred to as the mean)

Median- middle value of a data set

Electrical conductivity- test that focuses on the presence of dissolved, electrically charged particles in the water

Hydrochloric (water) cycle- the cycle that water goes through as it first evaporates from a body of water and turns into a gas, then falls as some form of precipitation (rain or snow), and after becomes either a form of ground water or surface runoff back into the body of water 

Direct water use- water use that can be directly measured

Indirect water use- hidden uses of water that may never have been considered

Gaseous state- form of water (water vapor)

Liquid state- form of water (liquid in lakes, rivers, oceans, clouds, rain)

Solid state- form of water (ice)

Surface water- water supply that originated in a river or other body of water

Groundwater- water supply that originated in a well

Aquifer- a water-bearing layer of rock, sand, or gravel

Unit 1B (B1-B4) Vocabulary List

Matter- anything that occupies space and has mass

Physical properties- properties that can be observed and measured without changing the chemical makeup of the substance

Density- mass of a material within a given volume (m/v)

Freezing point- temperature at which water transforms from a liquid into a solid

Aqueous solution- a water-based solution

Mixture- result when 2 or more substances combine, and yet they keep their individual properties

Heterogeneous mixture- mixture that is not the same, or uniform, throughout

Suspension- (heterogeneous) if the solid particles are large enough to settle out or can be separated by using filtration

Tyndall effect- the scattering of light once it is shone through a sample of purified water

Colloid- heterogeneous mixture where small, solid particles are still in the water

Homogeneous mixture- mixture that is the same, or uniform, throughout

Solution- always homogeneous mixtures

Solute- dissolved substance

Solvent- the dissolving agent

Particular level- the level of the atoms and molecules

Atoms- building blocks of matter

Element- matter that is made up of only one kind of atom

Compound- substance that is composed of the atoms of two or more elements linked together chemically in certain fixed proportions

Chemical formulas- formulas that represent compounds and elements

Substance- an element and compound with a uniform and definite composition, as well as distinct properties

Molecule-smallest unit of a molecular compound that retains the properties of that substance