Science 2.6-2.8 Flashcards
The ability to do work
Energy
Moving, working energy
Kinetic energy
A material that is burned to release energy
Fuel
Energy moved from one place to another
Transferred Energy
What are sources of fuel energy?
Coal, oil, and natural gas
A buildup of electrical charge
Static electricity
The positive center of an atom
Nucleus
A negative particle of an atom
Electron
To pull together
Attract
To push apart
Repel
What is all matter made of?
Molecules
What are molecules made of?
Small particles called atoms
The spark you sometimes feel when you touch a doorknob or other object is called?
Static electricity
An atom has a _____ nucleus and ______ electrons.
Positive, negative
Rubbing two objects together can cause atoms to lose or gain _______.
Electrons, creating an imbalance
Put in order from largest to smallest: atom electron, molecule
Molecule, atoms, electrons
The flow of electrons along a path
Current electricity
A machine that converts mechanical energy into electrical energy
Generator
A material that can easily transfer (electrical) energy
Conductor
Bundled wires, covered in plastic or another insulator
Cable
A material that cannot easily transfer energy
Insulator
An uninterrupted path of electricity; allows an electrical current to flow
Closed circuit
An interrupted path of electricity; does not allow electrical current to flow
Open circuit
T or F: A generator can make current electricity
True
T or F: electricity can transfer from one place to another because of flowing ELECTRONS.
True
T or F: Plastic is a good CONDUCTOR of electricity.
False - plastic is a good electrical insulator
Metal is a good conductor of electricity
T or F: when you turn an electric light on, you are OPENING the circuit
False - closing the circuit
T or F: a closed circuit can turn OFF a light
False - ON
