Environmental test 2
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Created by:
thechawking on March 26, 2012
Description:
The magic of water; Nutrient cyles
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33 terms
Terms | Definitions |
|---|---|
 Ecology | The scientific study of relationships between organisms and their enviroment |
| Matter | Everything that takes up space and has mass |
| 4 states of matter | Liquid, gas, solid, plasma |
| conservation of matter | Matter is transformed and combined in different ways, but it doesn't dissapear |
| Elements | Substances that can be broken down into simpler forms by ordinary chemical reactions |
| Atoms | Are the smallest particle that exhibit the characteristics of an element |
| Electrons | Are tiny in comparison to other particles, orbit the nucleus at the speed of light, negatively charged parts of an atom |
| Protons | The positive charge of an atom |
| Neutrons | electrically neutral part of an atom |
| Atomic number | the number of protons in the nucleus of an atom |
| Isotopes | atoms of the same element that have different numbers of neutrons |
| Compounds | Substances composed of different kinds of atoms |
| molecule | A pair or a group of atoms that can exist as a single unit |
| Ionic bond | When ions with opposite charges form a compound the electrical attraction holding them together is an? |
| oxidized | When an atom gives up one or more electrons, we say it is oxidized |
| Reduced | When an atom gains electrons |
| Ions | Charged atoms |
| Anions | Negatively charged Ions |
| Cations | Positively charged ions |
| Acids | Substances that readily give up hydrogen ions in water |
| Bases | Substances that readily bond with H+ ions |
| Acids | Have a Ph of less then 7 |
| Bases | Have a PH of greater then 7 |
| Organic compounds | The material of which biomolecules, and therefore living organisms, are made |
| Lipids | Store energy for cells, and they provide the core of cell membranes, and other structures. They do not readily dissolve in water |
| Carbohydrates | also store energy and provide structure to cells |
| Proteins | Composed of chains of subunits called amino acids, folded into complex three-dimensional shapes, they provide structure to cells and are used for countless functions |
| Cells | Minute compartments within which the processes of life are carried out |
| Enzymes | A special class of proteins carry out all the chemical reactions required to create these various structures |
| energy | Is the ability to do work such as moving matter over a distance or causing a heat transfer between two objects at different temps |
| Kinetic energy | The energy contained in moving objects |
| Potential Energy | Is stored energy that is latent but available for use |
| Chemical energy | Stored in food |
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