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Science Atoms quiz
Terms in this set (14)
A pure substance that is made of only one kind of atom and cannot be broken down into a simpler substance
the smallest amount of an element that has the properties of that element
a pure substance made up of atoms of two or more elements that are attached together
the number of protons in the nucleus of an atom which determines the chemical properties of an element and its place in the periodic table
two or more atoms tightly bonded together to form a neutral particle
examples of molecules
H2O-compound and molecule, N2-not compound but is a molecule
made by or from a living organism
it is in every living cell, its a component of armino acids, directly involved with photosynthesis, stimulates above ground plant growth, makes plants green if healthy, related to the fruit size
Soil is a complex mixture made up of what materials?
living and non-living matter that contains air, water, minerals, particles of rock or sand, and a soil other organisms,
What are the overall characteristics of soil
composition and size off its inorganic particles, % of decaying organic material it contains, the amount of water it is able to hold
What affect does pH have on soil?
it affects the availability of mineral nutrients to plants
(acids = 1, alkaline = 14)
What are the negative effects of excessive or improper fertilizer use?
fertilizers that leach down though the soil and into the groundwater may contaminate water supplies with nitrates. Excessive nitrate concentration in drinking water can contribute to a blood disorder in infants
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