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1.1-1.3 terms
Term | Definition |
---|---|
biosphere | all organisms and the part of Earth where they exist |
biodiversity | variety of life within an area |
species | group of organisms so similar to one another that they can breed and produce fertile offspring |
biology | scientific study of all forms of life |
science | the knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws or principles that can be verified or tested |
organism | any individual living thing |
cell | basic unit of life |
metabolism | all chemical processes that synthesize or break down materials within an organism |
DNA | molecule that stores genetic info in all organisms |
system | changing, organized group of related parts that interact to form a whole |
ecosystem | collection of organisms and nonliving things, such as climate, soil, water, and rocks, in an area |
homeostasis | regulation and maintance of constant interal conditions in an organism |
evolution | change in a species over time; process of biological change by which descendents come to differ from thier ancestors |
adaptation | inherited trait that is selected for over time because it allows organisms to better survive in their environment |
observation | using the senses to study the world; using tools to collect measurements; examining previous research results |
data | observations and measurements recorded during an experiment |
hypothesis | proposed explanation or answer to a scientific question |
experiment | process that tests a hypothesis by collecting info under controlled conditions |
independent variable | condition or factor that is manipulated by a scientist during an experiment |
dependent variable | experimental data collected through observation and measurement |
constant | condition that is controlled so that is does not change during an experiment |
theory | proposed explanation for a wide variety of observations and experimental results |