Static Electricity - Gr.9 Flashcards
nnScientifc Method
What is the Scienitic Method?
It is the process used to find answers about the questions about the world around us.
If an object is positively charged then does it have too much protons?
No, it is lacking electrons.
Protons dont move
What is the electron theory of charge?
Electrons can move. Atoms of some elements hold their electrons more loosely than others. rubbing removes the more loosely held elctrons from one material to the other.
What is static electricity?
It is the imbalance of positive and negative charges on the surface of an object.
If an object is neutral, what does it have?
The same amount of protons and electrons.
every object wants to neutral
What is the law of electric charges?
A charged object exerts an electric force that can either be a repulsive or an attractive force.
What does the strength of a charged force depend on?
- the amount of charge on each object (electric force increases with increased charge)
- distance between charged objects (electric force decreases with increased distance)
What happens when two opposite charged object are near eachother?
They will attract each other
Unlike charges attract
What happens when two object with the same charge are near each other?
They will repel
Will a charged object repel a neutral one?
No. they will attract.
Two neutral object will do nothing (no repel or attract)
What is charge induction?
The rearrangement of electrons. (when a charged object is brought near a neutral object the electrons will rearrange)
during charge seperation, there is NO gain or loss of electrons.
.
What are two ways to detect electric charge?
- Pith ball electroscope
- metal leaf electroscope
All matter is made up of tiny particles called ________
atoms
What are conductors and insulators?
Conductors allow electrons to move freely.
Insulators hold their electrons tightly.
What is grounding?
Allowing electrons to flow from an object to the earths surface.
Lighting rods are an example of this
