An agreement between buyer and seller. Its commonly secured by the down payment. If the buyer changes their mind the seller must return the payment.

An ad sent in the mail that is the size of a post card. It has a space for a stamp on it as wel as the advertisers address.

When something can end only two ways. It is either better or worse, yes or no, or head or tail for example. If the success probability is known than a calculation can

A model used to show option values in different time periods at different prices. Only two prices are used in the model. The reality is that the price may have more than

1. analyzing a sample of an organism to see if they were exposed to hazardous substances and how much. 2. using live animals to test pollution in an environment.

Anything that kills life forms when it is placed on them.

Any enzymes used to get rid of waste. They are turned into a more useful harmless form.

1. the amount of living matter in an area. 2. the organic matter that is renewable and available.

Using electronics to measure the biological characteristics of a person. Refer to biometric authentication.

Reducing the contaminants in soil or water. Microorganisms are used to do this by bioaugmentation. They are introduced as a liquid that will cause them to grow. Refer to phytotreatment.

The atmospheric layer that has the whole terrestrial eco system in it. It has all living things in it and supports soil, water, and air. AKA ecosphere.

Any nonhuman life in the geographical area.

Using biolog to make industrial copies of naturally occuring substances from the organisms that made them. Genetic engineering is just one example of this technology.

Any energy that comes from composting biological materials. It produces heat and methane that is an alternate to natural gas. It will take more research to make this a more convenient option.

Any living activity that is produced by an organism. It is the opposite of abiotic.

An investor who searches but does not buy a property.

A digit in binary code. It is a b and is the smallest unit for computing information. The information is stored in 0s and 1s. Refer to byte.

The magnetic tapes bit density used to back up any application on a computer.

Any device whose inputs and outputs are known but not well. The process may not be fully understood or known due to a confidentiality need. Refer to white box.

When the input of advertising is used to study the output or buying.