NATURAL SCIENCE 5th LEVEL UNIT 7: ELECTRICITY AND INVENTIONS 1. What’s electricity Electricity is formed when a part of each atom, called an electron, moes from one atom to another! !
What What’s ’s a" at#$ at#$ $a%e $a%e &' #( #( The "&cle&s is "&cle&s is made "p of 'r#t#"s and "e&tr#"s! "e&tr#"s! The protons hae a positie electric char%e! The electr#"s reole electr#"s reole aro"nd the n"cle"s, so they are constantly moin%! They hae a ne%atie electric char%e!
!
What What’s ’s stat static ic elec electr tric icit ity y Static electricity is electricity is the moement of electrons #etween two materials! Electrons can moe easily #etween materials when we r"# them to%ether! This creates static electricity! electricity! O''#site char*es attract each attract each other! (#)ects with the sa$e electric char*e are re'elle%
). What’s electric c&rre"t Electric c"rrent is the moement, or flow, of electrons #etween atoms! Some types of matter hae electrons that moe easily from one atom to another! $e call these electrical c#"%&ct#r #eca"se #eca"se electricity can flow easily thro"%h them! &etals are an e'ample e 'ample of electrical cond"ctors!
The world’s largest digital library
Try Scribd FREE for 30 days to access over 125 million titles without ads or interruptions! Start Free Trial Cancel Anytime.
The world’s largest digital library
Try Scribd FREE for 30 days to access over 125 million titles without ads or interruptions! Start Free Trial Cancel Anytime.
*
Electricity a"% $a*"etis$! $a*"etis$! $hen electric c"rrent flows thro"%h wires, a $a*"etic (iel% is (iel% is prod"ced! This happens #eca"se ne%atiely char%ed electrons are moin% thro"%h the wire! $e can ma+e the ma%netic field stron%er #y windin% the wire into a coil aro"nd an o#)ect made of iron! This forms an electr#$a*"et! electr#$a*"et!
+. Why %# ,e "ee% electric circ&its An electric circ"it is a close loop or or circle! Electricity will only flow if the circ"it is close! If the circ"it is #ro+en or the switch is off, the c"rrent stops flowin%! !
Ty'es #( circ&its
SI-LE CIRCUIT The #attery is connected to the li%ht #"l#, the li%ht #"l# to the switch and the switch to the #attery! #attery!
SERIES CIRCUIT Two or more li%ht #"l#s are connected to one #atttery, #"t all are connected within the same circ"it!
ARALLEL CIRCUIT
A parallel parallel circ"it forms two or more cicles, one #i%%er tan the other! Each circ"it has a li%ht #"l#! All the circ"its are connected to the same #attery!
The world’s largest digital library
Try Scribd FREE for 30 days to access over 125 million titles without ads or interruptions! Start Free Trial Cancel Anytime.
/. 0#, %# ,e &se electricity Electricity is "sed in many ways in o"r homes, schools and wor+places! !
!
0#, 0#, %#es %#es elec electr tric icity ity *et *et t# #&r #&r h#$ h#$es es Electricity is %enerated in power stations! rom the power station, the electricity traels alon% #i% ca#les to o"r homes! At At the place where electricity enters o"r ho"se, there is a (&se #2. 0#, 0#, %# ,e &se &se ele elect ctri rici city ty i" #&r #&r h#$ h#$es es rom the f"se #o', the electricity traels thro"%h wire to all the li%ht switches and soc+ets in o"r home!
3. Wh# ,as Th#$as E%is#" Thomas Edison was an American inentor! -is most important inentions were the electric li%ht #"l#, motion pict"res and recorded m"sic!
