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35 Cards in this Set
- Front
- Back
science
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organized way of using evidence to learn about the natural world
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inference
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logical interpritation based on prior knowledge and expirience.
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spontaneous generation
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the idea that living matter can come out of nothing
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metabolism
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the combination of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
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homeostasis
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the process by which organisms keep their internal conditions relatively stable
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compund light microscopes
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allow light to pass through the specimen and use two lenses to form an image
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electron microscopes
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focus beams of electrons on specimens to magnify them 100x more than a light microscope
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cell culture
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group of cells
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cell fractination
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when scientists divide up the parts of the cell
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ionic bond
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formed when one or more electrons are transferred from one atom to another
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ions
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an atom that gains electrons and has a negative charge
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covalent bond
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forms when electrons are shared between atoms
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van der Waals forces
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when molecules are close together, a sliht attraction can develop between the oppositley charged regions of nearby molecules
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cohesion
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attracion of molecules of the same substance
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adhesion
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attraction of molecules of different substances
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solution
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made of a solute, the substance that is dissolved, and the solvent, the substance in which the solute dissolves
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suspensions
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mixture of water and a non dissolved material
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buffers
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weak acids or bases that can react with strong acids or bases to prevent sharp, sudden changes in pH
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monomers
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compounds that join together to form polymers
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carbohydrates
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compounds made of carbon, hydrogen, and oxygen atoms with a ratio of 1:2:1
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monosaccharides
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single sugar molecules
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polysaccharides
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lare macromolecules formed from monosaccharides
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lipids
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oils, fats, and waxes made mostly from carbon and hydrogen atoms
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nucleic acids
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macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus(DNA and RNA)
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nucletoides
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consist of 3 parts: a 5-carbon sugar, a phosphate group, and a nitrogenous base
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proteins
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macromolecules that contain nitrogen as well as carbon, hydrogen, and oxygen
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amino acids
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compounds with and amino group on one end and a carboxyl group on the other
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activation energy
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energy needed to get a chemical reaction started
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catalyst
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substance that speeds up the rate of a chemical reaction
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enzymes
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proteins that act as a biological catalysts
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ecology
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the scientific study of interactions amoung organisms and their environment
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what ecology studies in order from least to greastest
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individual, population, community, ecosystem, biome, biosphere
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chemosythesis
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when organims use chemical energy to produce carbohydrates
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detrivores
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feed on plant and animal remains
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trophic level
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each stem in a food chain or food web
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