Science Review 4º

Atoms with positive charge

• Protons

• Neutrons

• Electrons

Atoms with negative charge

• Protons

• Neutrons

• Electrons

Atoms with no charge

• Protons

• Neutrons

• Electrons

Repulsion:

• A material or an object that conducts heat, electricity, light, or sound

• A material or object that does not easily allow heat, electricity, light or sound to pass through it

• Charges that are the same repel one another, or push each other again 

Insulator:

• A material or an object that conducts heat, electricity, light, or sound

• A material or object that does not easily allow heat, electricity, light or sound to pass through it

• Charges that are the same repel one another, or push each other again 

Conductor:

• A material or an object that conducts heat, electricity, light, or sound

• A material or object that does not easily allow heat, electricity, light or sound to pass through it

• Charges that are the same repel one another, or push each other again 

This object is a conductor

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This object is an insulator

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It is made up of tiny particles that move in waves

• rays

• light

• propagation

A beam coming from a light surface

• rays

• light

• propagation