Term
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Definition
- a substance that enriches soil so that plants will grow better.
-contains nitrigen(n) and potassium(k)
-can be natural o0r synthetic |
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Term
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Definition
- chemicals used to kill pests.
-pesticides are not selective- they kill pests and non-pests. |
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Term
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Definition
1. herbicides- use to kill weeds
2. insecticides- use to kill insects
3.fungicides-use to kill fungi |
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Definition
- garbage collected from household,industrial plants and commercial buildings; from machinery to plastic bottles. |
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Term
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Definition
- is a wastewater containing dissolved ande undissolved materials from your kitchen,bathroom, and laundry.
-moves through pipes into septic tank in rural areas on to sewage treatment plant in towns and cities. |
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Term
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Definition
| - an underground container where the bacteria break down the organic materials before they are moved out to the soil. |
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Term
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Definition
- treats watse from homes , businesses ,industries and institutions.
-it may also treat water from street drains. |
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Term
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Definition
| - treated wastewater released into rivers amd lakes. |
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Term
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Definition
| - large pipes that carry runoff water from yards and streets directly(without treatent) into a river,lake or ocean. |
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Term
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Definition
-releases chemicals into the air,water aned soil.
-growing crops ,desposing of solid waste treating wastewater,manufacturing products, and drivibg vehicles are all examples of ways that we can change the concentration od some chemicals in the environment.
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Term
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Definition
| -any change in the environment that produces a condition taht is harmful to living things. |
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Term
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Definition
| -any subject of importance about which people have strong ,conflicting points of view. |
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Term
3 examples of fossil fuels |
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Definition
1. oil
2.natural gas
3.coal
-because they formed from dead animals and plants. |
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Term
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Definition
| -periods of extreme acid rain. |
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Term
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Definition
| -such as electrical power genenration, mineral processing and fertilizer production may release chemicals into the air. |
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Term
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Definition
- is composed of compounds such as met5hane ,etthane, propane, aand butane.it also contains nitrogen gas ,carbon dioxide ,hydrogen sulfide ,helium and traces of metals such as mercury.
-it is also process to eliminate unwanted substances such as hydrogen sulfide ,a poisonous chemical.(processing to its seperate components) |
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Term
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Definition
| -a natural gas that contains H2S. |
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Term
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Definition
| - a natural gas that dont present H2S. |
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Term
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Definition
| -compound tht are dissolves in water to form a solution with a pH lower than 7 , taste sour,undergo similar chemical reactions. |
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Term
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Definition
| -compound that is dissolves in water to form a solution with a pH higher than 7 ,taste bitter, feel slippery, react with acids. |
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Term
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Definition
| -number of a solution indicates its acidity. a measure of the concentration of hydrogen ions in a solution. |
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Term
acid-base indicators
(measuring pH) |
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Definition
| -are substances that can change colour when they are placed in solution. |
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Term
universal indicator
(measuring pH) |
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Definition
| -is a mixture o indicators that can change colours over a wide variety of pH levels. |
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Term
red litmus
(measuring pH) |
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Definition
| -turns blue with the base |
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Term
blue litmus
(measuring pH) |
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Definition
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Term
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Definition
-amount of a substance taht provides an organism with the best health.
-can have harmful effects if there is too much or little of nutrients.
* for humans , at least 70 mg (microrganisms) of selenium per day is recommended. |
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Term
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Definition
| -process in which molecules mvefrom an area of higher concentration [] to one of lower concentration[]. |
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Term
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Definition
| -water moves through the walls of the plants roots where there are more water molecule to an area where there are fewer water molecules. |
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Term
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Definition
| - peroids of extreme acid rain. |
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Term
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Definition
-compounds whose molecules contain carbon
-anything made from a living system
examples: fats,carbohydrates, proteins,nucleic acids |
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Term
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Definition
-compounds whose molecules do not contain carbon.
examples;rocks,minerals,elements. |
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Term
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Definition
| -elements and compounds that organisms need for growing,living and reproducing. |
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Term
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Definition
-nutrients taht organisms need n relatively large amounts
examples:C,H,O,N,C
-mainly organic materials |
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Term
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Definition
-nutrients that organisms need in only minor or trace amounts
-vitamins, minerals |
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