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Key Vocabulary

Lesson 1: Living Organisms

Autotroph – organism that can create its own energy

Cell – the smallest part of an organism still considered to be alive

Classification – organizing things into groups

Control Group – group that receives a no change in an experiment

Data – Information collected during an experiment
Ecology – branch of life science that studies the interaction of living things

with other living things and non-living things
Evidence – an observation of a thing, group of things, or a process that
takes time

Experimental Group – group that receives a change that is being tested
during an experiment

Food Web – model showing what living things eat what in a certain area

Heterotroph – organism that must eat other organisms to get its energy

Homeostasis – process of maintaining a stable internal environment in an
organism

Hypothesis – a possible answer to a scientific question

Life Science – the study of living things and how they interact with their
environment

Model – a representation of something else

Observation – anything noticed using the five senses
Organism – a living thing

Placebo – inactive substance looking similar to the medication being tested

Reproduction – process of creating new organisms

Scientific method –a series of steps that can be used to answer questions
and solve problems

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