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Grade 8 objective 4.1
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by friction, the wool transfers electrons to the balloon. Therefore... The balloon becomes ______ charged and the wool becomes __________ charged
negatively; positively
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Okay!
When electric charge builds up on an object, it is known as __________
static electricity
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______charges neither attract nor repel.
Neutral
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Electric fields can be shown as lines . These field lines point ________ negative charges
towards
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Like charges ______
repel
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The force may be _______ or ________
attraction or repulsion
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If there is a transfer of charge without contact between materials it is known as ____________
induction
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The charges are transferred by ________
friction
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If you rub a balloon with a wool cloth: The friction causes the wool to transfer _______ to the balloon
electrons
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A charge experiences an electric force when it is placed in an_______________
electric field
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An electric __________ can be positive or negative
charge
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electric field lines always point away from ___________ charges
positive
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Atoms may become positive or negative by gaining or losing _______
electrons
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________ charges attract
unlike
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The strength of an electric field depends on ____________ and ________
the size of the charge; the distance away from the charge
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An atom that ______ electrons is negative
gains
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When objects lose their electric charge it is known as _____________
electrical discharge
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An atom that loses electrons is __________
positive
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Okay!
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