Mia's science quizz 5
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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What are subatomic particles?
Neutrons, protons, and electrons
Which charges can move?
Electrons
What are the laws of attraction and repulsion?
Opposites attract and likes repel
How do objects become electrically charged?
When electrons from 1 object gets transferred to another
What 2 variables does the strength of an electric force depend on?
The total amount of charge on both objects and the distance between the objects
What are some examples of a conductor?
Most metals like, copper and aluminum
What are some examples of a insulator?
Glass, rubber, and wood
What are some examples of electric disharge?
Lightning, and when your hair is no longer attracted to a brush
Describe how lightning forms, including the charges?
When the buildup of opposite electrical charges within a storm cloud discharge into the ground. Positive charges are at the top of the cloud and negative charges are at the bottom.
How does a Van de Graaff generator make your hair stand up?
By transferring a large electrostatic charge to the person touching it. The electrons in the hair go into the generator making the hair stand up.
What is static charge?
An unbalanced negative of positive electric charge on an object
What is an electric field?
An invisible region surrounding any charged object
What is an electric insulator?
A material in which electrons cannot easily move
What is an electric conductor?
A material in which electrons can easily move
What is polarized?
When electrons concentrate at 1 end of an object
What is electric discharge?
The process of an unbalanced electric charge becoming balanced
What is grounding?
Providing a path for electric charges to flow safely into the ground
What is a Van de Graaff generator?
An electrostatic device that creates high-voltage static electricity
What is a magnet?
Any object that attracts the metal iron
What is a magnetic material?
Any material that is strongly attracted to a magnet
Where is a magnet field the strongest? The weakest?
It is strongest at the poles, and the weakest in the middle and the farther away you get
What happens if you break a magnet into pieces?
Each piece will have a north and south pole
Study number 3
What produces Earth’s magnetic field?
Molten iron and nickel in it’s outer core