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| is an organized method to obtain data and analyze it |
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Provide natural explanations for events in the natural world
Understand patterns
Make predictions
Begin with observations
Make inferences ( logical interpretations)
Lead to hypothesis |
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State problem to be investigated
Form a hypotheses
Set up controlled experiment- one variable
Record and analyze results-data is quantative or qualitative
Form a conclusion
Develop theories |
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| What is a controlled experiment |
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| Only one variable is tested at one time |
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| is the one factor that is changed (Manipulated variable) |
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| is what changes in response to manipulated variable, (Responding variable) |
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| receive the same conditions as experimental group except for independent variable |
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A well tested explanation
Help make accurate predictions about new situations |
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All living things made of cells
Smallest unit of life |
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| produce new organisms by reproduction |
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| two cells from two different parents produce a new organism |
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| new organism has only one parent |
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| offspring and parent have exactly same traits |
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| go through changes to become adult form |
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All living things take in materials
All living things utilize materials to make energy |
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| to changes in environment in different ways |
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Process of keeping internal systems stable
Threatened by changes in environment
If changed in a major way- organism cannot survive |
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| ability of a group of organisms to change over a long period of time- hundreds of thousands or millions of years |
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Definition
Smallest unit of an element
Has all properties of that element
Made of electrons
Made of protons
Made of neutrons
About 120 different atoms( elements) |
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Groups of atoms chemically bonded
Smallest unit of most chemical compounds |
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| Smallest functional unit of life |
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| Groups of cells forming one working unit |
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| Groups of organs working together in one system |
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| Groups of tissues working together |
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| Group of organisms- of one type- that live in the same area |
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| The community and nonliving surroundings |
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| living parts of ecosystem |
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| nonliving parts of ecosystem |
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| A group of ecosystems working together |
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| The part of the earth that contains all ecosystems |
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help your cells function properly
(nucleus mitochondria) |
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