| A | B |
|---|
| SI system | a system of measurement based on the number 10 |
| graduated cylinder | a tool used to measure liquid volume in milliliters |
| triple-beam balance | a tool used to measure mass in grams |
| observation | an exact reprot of information gathered by your 5 senses |
| hypothesis | a prediction about the outcome of an experiment |
| data | information |
| inference | an explanation or interpretation of observations |
| habitat | the place where an organism lives and that provides the things it needs |
| species | a group of organisms that are similar and reproduce to produce fertile offspring |
| population | all the members of one speices in a particular area |
| community | all the different populations that live together in an area |
| ecosystem | all the living and nonliving things that interact in an area |
| ecologist | someone that studies how living things interact with each other and their evnironment |
| abiotic factor | a nonliving part of an ecosystem |
| biotic factor | a living part of an ecosystem |
| bioindicator | an organism tat is sensitive to changes in the environment and shows changes are taking place (example- water fleas) |
| food chain | a series of events in which one organism eats another |
| food web | the pattern of overlapping food chains in an ecosystem |
| producer | an organism that can make its own food |
| consumer | an organism that gets energy by eating other organisms |
| decomposer | an organism that breaks down wastes and dead organisms |
| herbivore | a consumer that only eats plants |
| omnivore | a consumer that eats both plants and animals |
| carnivore | a consumer that only eats meat |
| pH | a scale form 1-14 that measures whether a chemical is an acid, base, or neutral |
| acid | a group of chemcials that have a pH lower than 7, taste sour, dissolve metal, and conduct electricity well (examples- vinegar and orange juice) |
| base | a group of chemcials that have a pH higher than 7, taste bitter, and don't conduct electricity well (examples- ammonia, baking soda) |
| neutral | a group of chemicals that are neither acids nor bases adn ahve a pH of 7 (example- water) |
| acid rain | rain with a pH lower than 7 that can cause environmental damage |
| nitric acid rain | acid rain cuased mainly by cars adn trucks |
| sulfuric acid rain | acid rain caused mainly by electric utilities |
| buffer | substances that can make things less acidic or basic (example- limestone can make a lake less acidic) |
| neutralization | the process of making something neutral (pH of 7) |
| limestone | a type of rock or soil that acts as a buffer |
| granite | a type of rock or soil that does not act as a buffer |
| sediment | particles of rock and sand |
| erosion | the process by whcih water, wind, or ice movers particles of rock ro soil |
| turbidity | how hard it is to see through water (how muddy it is) |
| secchi disk | a tool used by scientists to measure the turbidity of water |
| clear-cut logging | when all the trees in a n area are cut down at once |
| selective cut logging | when only some trees in an area are cut down at once |
| sustainable yield | a regular amount of a renewable resource that can be harvested without reducing the future supply |
| immigration | moving into a population |
| emigration | moving out of a population |
| birth rate | the number of birhts in a population in a certain amount of time |
| death rate | the number of deaths in a population in a certain amount of time |
