# Science Exam

The flashcards below were created by user lexieb225 on FreezingBlue Flashcards.

1. has a definite size & shape; particles packed together tightly; molecules move in a slow, constant motion; high melting boiling point
Solid
2. has a definite size & shape; particles more active and far apart; low melting point; lower boiling point than solid; active at room temperature
3. Liquid
4. no definite size or shape; fills whatever container it occupies; particles move freely & are far from each other
Gases
5. Water freezes at???????
320 F or 00 C
6. Water boils at????????
7. 2120 F or 1000 C
8. change from a liquid to a solid state, caused by a lowered temperature
Freezing
9. solid to a liquid state, caused by raising the temperature
Melting
10. liquid to a gas state, caused when the liquid is heated
Evaporation
11. gas to a liquid, caused by a lowering of temperature
Condensation
12. solid to a gas without going through a liquid state
Sublimation
13. Electricity
the energy resulting from the flow of electrons
14. results when an object has to many or to few electrons
Electric Charge
15. have a positive charge
Protons
16. have a negative charge
Electrons
17. an electric charge build up in one place
Static Electricity
18. something that allows electricity to flow through it easily
Conductor
19. a substance that is a poor conductor of electricity
Insulator
20. a steady flow of electrons or other charged particles through a conductor
Electric Current
21. a flow of electrons in one direction such as in a battery
Direct Current (DC)
22. current that changes directions
Alternating Current (AC)
23. the difference in energy between the electrons in one place and the energy in the electrons in another place
Potential Difference
24. how hard it is to push electrons through a conductor
Resistance
25. rate at which a device changes electricity into another form
Electric Power
26. the energy used by an electrical device. The amount of energy depends on the amount of power delivered and the length of time the power is used.
Electrical Energy
27. an unbroken path formed by electrical conductors. In order to flow, a current must have and uninterrupted loop of electrical conductors. The electricity will flow from negative to positive ternminals.
Circuit
28. has only one path for the current to follow. The current is the same in every part of the circuit. If any part of the circuit is broken, the current stops. (Christmas tree lights, if one goes out they all go out)
Series Circuit
29. two or more separate branches for the current to flow. If the circuit is broken in one branch, the current will still flow to other parts of the circuit. (house electricity)
Parallel Circuit
30. a device on a circuit that can open and close the pathway to start and stop the flow of electricity (When the switch is open, there is no flow. Closed- no flow)
Switch
31. an object that attracts other magnetic materials
Magnet
32. substances that can be made into magnets by running electricity through them. To strengthen this, you can add more loops or increasing the current in the wire.
Electromagnet
33. the opposite ends of a magnet. The magnetic force is strongest at these locations. The poles are labeled north and south.
Magnetic Poles
34. the magnetic effects of a bar magnet are strongest near the....
ends
35. sprinkling iron filings over a bar magnet shows the magnet's....
a.relative strength
b. field lined
c.magnetic field
d. all of the above
d. all of the above
36. The area around teh magnet in which magnetic forces can be felt is called the magnetic.....
field
37. a push or pull
force
38. to pull together
attract
39. to push away
repel
40. the region around the magnet where the magnetic force acts. This region is near the poles, but extends out from the actual
Magnetic FIELD
41. Magnets that are permanate (never turn off)
bar magnet
 Author: lexieb225 ID: 2455 Card Set: Science Exam Updated: 2009-12-08T02:39:12Z Folders: Description: Matter, Electricity, and Magnets Show Answers: