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What is the importance of the mineral nitrogen for plants?
•component of amino acids
•Simulates above ground plant growth and fruit size
What is pH and what affect does it have on soil?
•Soils can be too alkaline or too acidic
• availability of mineral nutrients to plants
Soil is made up of what materials?
air, water, minerals, particles of sand, organic material in process of decay
What are the characteristics of soil?
•rock that was formed
•species of organisms living in the soil
•how it absorbs and retains water
what negative effects can the use of fertilizers have?
•Can leach through the soil and contaminate ground water
•fertilizers can get into ponds or lakes
• algae plants grow excessively
•deprives other organisms of water
•can dry up body of water
Define: element and give an example
Is a pure substance made of 1 kind of atom and cannot be broken down in a simpler substance Example: hydrogen
Define: compound and give an example
Is a pure substance made up of atoms of two or more elements that are attached or bonded together. Example: hydrogen gas
Define: molecule and give an example
The smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound. Example: H20 is a molecule of water
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