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31 Cards in this Set

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Precise means of asking questions about the natural world.
Scientific Method
A tentative explanation of a phonomenon based on plausible scientific knowledge. Must be testable and lead to conclusions.
Hypothesis
Based on deductive "if/then" reasoning
Predictions
A hypthesis that has high probability of being correct because it has been tested repeatedly and found correct.
Theory
The best example of a theory is the...
Theory of Evolution
The condition under study and which is manipulated by the experimenter.
Independent Variable
The variable being measured.
Dependent Variable
In an experiment, this controls every variable but one.
Control Group
Science is...
Progressive ( things change over time)
Characteristics of science include...
1. dealing w/ natural world
2. rational/logical thought
3. idea that the universe is explainable
Branch of philosophy w/ idea that the universe is explainable
Mechanism
Living things have a vital force beyond chemistry and physics. Deals with supernatural and religious ideas.
Vitalism
Limitations of Science include...
1. religion and the supernatural
2. morals, ethics, virtues, justice
3. uncertainty
Characteristics of living things include...
1. complex and highly organized
2. take in energy from their environment
3. capable of growth and reproduction
4. respond to their environment
5. evolve
A body part composed of several tissues that are grouped together
organs
an association of cells of one type performing one function
tissues
prefix meaning large
macro
organisms that obtain organic material from outside themselves
heterotrophs
organisms that can synthesize their own organic material by taking energy from sunlight
autotrophs
The smallest unit of an element that still retains chemical properties of that element
atom
The number of protons is equal to the...
number of electrons
number of protons in atomic nucleus
atomic number
Protons and neutrons contribute to the...
atomic mass (atomic weight)
The unit for atomic mass
Dalton
Forms of an element that differ in mass due to the number of neutrons they contain. Can sometimes be radioactive
isotopes
Space in which an electron is found 90% of the time
orbital
Electrons are classified by...
the energy they possess
electrons will arrange to have the...
minimum amount of energy possible
Atoms or groups of atoms that have a net charge
ion
two or more atoms linked together by chemical bonds
molecules
A chemical bond formed by electrical attraction between a positive and negative ion. Can only be formed between atoms that need to loose one or two electrons. The intermediate strength.
ionic bond