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Unit 1 Vocabulary You are to write the word on the front of the card – then write the definition on the back of the card.
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Scientific Method
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a series of steps a scientist uses to answer a question or solve a problem
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Hypothesis
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a possible explanation or answer to a scientific question
(“educated guess”)
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Control (Constant)
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is a factor or condition that does not change in an experiment
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Controlled Experiment
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an activity that you design to answer a scientific question that tests
only one variable at a time
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Variable
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the factors in a controlled experiment that can
change (control, independent and dependent variables)
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Independent Variable
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the factor or condition that is changed in an experiment
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Dependent Variable
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the factor or condition that changes as a result of the action of independent variable
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Theory
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well-tested explanation that is consistent with all available evidence
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Precision
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The exactness of a measurement and also how consistently the
measurement can be reproduced
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Accuracy
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The comparison between a
measurement and an actual value (the closer the measurement is to the actual value the more accurate it is)
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Technology
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The use of scientific knowledge to solve problems or engineer new products, tools, or processes
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DNA
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contains the blueprint for life – instructions
found in every cell of all living things – contains the blueprint for life – instructions for making proteins
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Classification
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organisms into orderly
the arrangement of organisms into orderly groups based on their similarities
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Kingdom
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Archaea Bacteria Protista Fungi Plantae Animalia
One of the classification levels for classifying living things. It falls immediately under the domain level. There are 6 recognized kingdoms we will study this year: Archaea Bacteria Protista Fungi Plantae Animalia
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Taxonomy
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the science of identifying, classifying and naming
living things
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Dichotomous Key
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a tool used to identify unknown organisms
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Cell
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a membrane-covered structure that contains all of the materials necessary for life -
(the smallest units of life) (the basic unit of life)
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Bacteria
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the smallest and simplest organisms on the planet
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Archaea
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Microscopic, single-celled organisms that live in extreme environments
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Asexual Reproduction
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a single parent produces offspring that are identical to the parent
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Binary Fission
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two new, identical cells
simple cell division, one cell divides into two new, identical cells - -used by bacteria (Type of asexual reproduction!)
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Sexual Reproduction
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two parents produce offspring that now contain genetic information from both parents
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Diffusion
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the movement of molecules from an area of high concentration to an area of lower concentration (can occur across cell membranes or outside of cells)
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Osmosis
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the diffusion of water molecules
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Prokaryotic Cells
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a cell with no nucleus (bacteria)
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Eukaryotic Cells
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a cell with a nucleus and other membrane bound organelles
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Biotic
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Abiotic
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the non-living parts of the environment
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the living parts of the environment
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Producer
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an organism that makes its own food
Cyanobacteria Plant-like protists Plants
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Consumer
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organisms that eat producers or other organisms for energy
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Decomposer
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an organism that gets energy by breaking down the remains of dead or decaying organisms and absorbing the nutrients
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