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100
to carefully observe nature in order to discover the laws of creation so these laws could be put to work for the benefit of mankind
What is the purpose of science?
100
the study of smilarities and differences in the body structure of different organisms
What is comparative anatomy?
100
an imaginary arrangement of rock layers that corresponds to the geologic time chart
What is geologic column?
100
the Greek philospher who the people in the Middle Ages looked to for ideas about science
Who is Aristotle?
100
Father of the evolution philosophy
Who was Charles Darwin?
200
during the 1500s modern science began due to people returning to the Bible during this time period
What is the Protestant Reformation?
200
the force of attraction that exists between any two objects
What is gravity?
200
a region surrounding a magnet in which other magnetic substances are attracted or repelled by the magnetic force
What is a magnetic field?
200
a colorful panorama of lights in the southern Hemisphere caused by particles of the solar wind striking the upper atmosphere
What is the aurora borealis?
200
unlike poles attract each other, but like poles repel each other
What is the law of magnetic poles?
300
the force between two magnetic poles is directly related to the pole strengths
What is the law of magnetic force?
300
electric current that flows in only one direction
What is direct current?
300
electric current that continually changes direction, flowing first one way and then another
What is alternating current?
300
a charged atom
What is an ion?
300
a combination of storage cells that provides more current than a single cell alone; a car batttery is a storage battery
What is a storage battery?
400
the common name for the kind of battery constructed by Alessandro Volta
What is voltaic pile?
400
a type of electrostatic generator invented by Robert J. Van de Graaff
What is a Van de Graaff generator?
400
the law which states that unlike charges attract each other, but like charges repel each other
What is the law of electric charge?
400
Father of electricity
Who is Thomas Edison?
400
the force a simple machine helps to overcome
What is resistance?
500
a kind of electric current in which the path that the electrons follow forms a closed hoop
What is a closed circuit?
500
a kind of electric circuit in which the path that the electrons follow cannot be completed because of an open gap that they cannot cross
What is an open circuit?