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Worksheets2018 G7 U1b Electricity Practice 1 - Static E.
Total questions: 15
Worksheet time: 48mins
To understand static electricity, we need to understand that atoms are the
smallest possible unit of a material
largest possible unit of a material
basic building blocks of materials in our world
A and C both
Everything is made of atoms! And every atom has a nucleus composed of positively charged particles called protons, with neutrally charged particles called neutrons. The particles that orbit around the nucleus that are negatively charged are called
Quarks
Leptons
Electrons
Neutrinos
Normally, an atom has an equal number of protons and electrons. So the positive charge (protons) and the negative charge (electrons) evens out. But electrons on the outer edges of an atom can be more loosely attached, so they can be transferred to another atom. When this happens, and an electron is lost, or transferred, to another atom, the original atom has a net ________ charge.
Positive
Negative
Neutral
None of above
One of the easiest ways to move electrons from one material to another is by rubbing them together. This rubbing creates an electron transfer from one material to another. Say you rub a balloon against your cloth. The end result is that the balloon has a net negative charge, while your cloth has a net positive charge because it lost __________ to the balloon.
protons
neutrons
electrons
nuclei
When we rub a balloon against a wall and create electron transfer, we have a buildup of negative charge on the balloon and positive charge on the wall. This makes the balloon stick to the wall! Why? Because opposite charges ____________ .
repel
attract
fall apart
get wet
When you walk across a carpet (in wool socks especially) you will transfer electrons from the carpet to your socks. These electrons spread out over the surface of your body, so now you have a net _________ charge! Then when you touch the door knob, you feel shock from the ______ __________ you generated!
negative ... static electricity
negative ... loud sound
positive ... static electricity
neutral ... loud sound
When a neutral object gains some electrons, it becomes ______
positive
neutral
negative
An object which attracts a negatively charged balloon is _________ charged
positively
neutrally
negatively
not enough information
An object which attracts neutral paper bits and attracts a negatively-charged balloon is _____________ charged.
positively
neutrally
negative
An object which attracts neutral paper bits and repels a negatively-charged balloon is ___________ charged.
negatively
positively
neutrally
An object which attracts a negatively-charged balloon AND attracts a positively-charged balloon is __________ charged.
positively
negatively
neutrally
Ms Jiang rubs two balloons with a piece of wool. What will happen when the balloons are brought near each other?
The balloons will repel each other.
The balloons will attract each other.
Nothing will happen
The balloons will pop.
