The World of Physics

2. good — or the opposite of negative.
3. a complete circular path that electricity flows through.
4. a negatively charged subatomic particle that can be either bound to an atom or free
7. a machine, especially one powered by electricity or internal combustion,
9. the rate at which electrons flow past a point in a complete electrical circuit - a complete circular path that electricity flows through
10. device for making and breaking the connection in an electric circuit
12. a subatomic particle found in the nucleus of every atom
14. the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light
15. a biological community of interacting organisms and their physical environment.
16. a subatomic particle found in the nucleus of every atom except that of simple hydrogen
18. a device that stores chemical energy and converts it to electrical energy
19. the opposition that a substance offers to the flow of electric current
21. a substance or material that allows electricity to flow through it.
22. energy that comes from a source and travels through space at the speed of light

1. a type of electromagnetic radiation that allows the human eye to see or makes objects visible
3. a physical property that causes matter to experience a force within an electromagnetic field.
5. the unit of electrical resistance in the International System of Units.
6. y type of force that causes objects to come together, even if those objects are not close to or touching each other
8. the International System of Units' (SI) standard unit of power (energy per unit time), the equivalent of one jouleper second
11. a particle of matter that uniquely defines a chemical element
13. lacking positive qualities
17. an electrical component that limits or regulates the flow of electrical current in an electronic circuit
20. electricity the result of an imbalance between negative and positive charges in an object.