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Life Science -Ch 1

Exploring Life

TermDefinition
organism a living thing that is made of one or more cells; uses energy; moves; reproduces; responds to its environment; adapts;has a life span
cell the smallest unit of an organism that can perform life functions
stimulus anything an organism RESPONDS to (such as sound; light; heat)
response the REACTION of an organism to a stimulus (Ex. plants moves towards light)
adaptation any characteristic of an organism that makes it better able to SURVIVE in its environment
homeostasis the REGULATION of steady, life-maintaining conditions inside an organism or cell, despite changes in the environment
development ALL the changes undergone by living things as they grow
life span the length of time an organism is expected to live
spontaneous generation the theory that NONLIVING things produce living things (Ex. frogs arise spontaneously from mud)
biogenesis the theory that LIVING things come only from other LIVING things
scientific methods problem-solving procedures used by scientists [state the problem; gather information; form a hypothesis; perform an experiment; analyze data; and draw conclusions
hypothesis a prediction that can be tested
variable the factor being TESTED in an experiment
control the STANDARD for comparison in an experiment
theory an EXPLANATION of things or events in nature, based on many observations (subject to change when evidence changes)
law a RULE that describes a PATTERN IN NATURE and how it works under certain conditions
SI Units International System of measurement used by scientists around the world (km; cm; mm) --> can compare results
Created by: amwilliams
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