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25 Cards in this Set
- Front
- Back
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Science
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An organized way of gathering and analyzing evidence about the natural world.
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What is a goal of science
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A goal of science would be to provide explanations for the natural world.
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Observation
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The act of noticing and describing events or processes is a careful way.
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Inference
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A logical interpretation based on what scientists already know.
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Hypothesis
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A scientific explanation for a set of observations that can be tested in ways that support or reject it.
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Controlled experiment
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Where only one variable is changed.
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Independent Variable
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(manipulated variable) The variable that is deliberately changed.
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Dependent Variable
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The variable that is observed and that changes in response to the independent variable is the Dependent.
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Data
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Detailed records of experimental observations.
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Biology
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The study of life.
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DNA
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The genetic code of life
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Stimulus
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A signal to which an organism responds.
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Sexual Reproduction
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Sexual reproduction is when cells from two parents unite for form the first cell of a new organism
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Asexual Reproduction
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Asexual is when a single organism produces offspring to itself
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Homeostasis
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When organisms need to keep their internal environment stable even when external conditions change dramatically.
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Metabolism
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The combination
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Biosphere
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All forms of life on Earth are connected into a biosphere.
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Atom
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Basic unit of matter.
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Element
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A pure substance that consists entirely of one atom
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Isotopes
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Atoms of the same element that differ in the number of neutrons they contain are known as isotopes.
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Compound
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A substance formed by the chemical combination of two or more elements.
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Ionic bond
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is formed when one or more electrons are transferred from one atom to another.
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Ions
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Positively and negatively charged atoms are known as ions.
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Covalent bond
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When electrons travel about the nuclei of both atoms, forming a covalent bond.
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Molecule
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Smallest unit of most compounds.
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