Science Unit 2; Lesson 1

Which of the following best describes electric charge?

• A force that causes objects to heat up

• A high-voltage material that can cause damage to objects

• A fundamental property that causes electric and magnetic interactions

• A particle that moves freely through matter and causes static electricity to build up on objects

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Peter's teacher tells him that he should not place his electric stereo near the edge of a pool because the water in the pool is a conductor. What does she mean when she says that water is a conductor?

• Water is a type of electrical energy

• Water damages electric circuits

• Electric charges cannot flow without water

• Electric charges move through water in the pool

When Bethany walks across a carpet, her socks pick up many negative electric charges. Later in the day, these negative charges are no longer present on her socks. What most likely happened to the negative charges?

• The charges disappeared.

• The charges transferred to another object.

• The charges switched from negative to positive.

• The charges broke apart into smaller positive and negative particles.

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An engineer is building an electronic device. She wants to use a material that will give her the most control over the amount of electric charge that flows through a circuit. Which material should she use?

• a conductor

• an insulator

• a semiconductor

• a tube

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The image shows two circular objects. Each has an electric charge as shown. What will happen to these objects when they are placed near each other?

• The objects will remain still.

• The objects will both move to the left.

• The objects will move towards each other.

• The objects will move away from each other.

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Atoms contain charged particles called:

• Protons, neutrons and electrons
• Protons and electrons
• Protons and neutrons
• Electrons and neutrons 

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Atoms contain charged particles called:

• Protons, neutrons and electrons
• Protons and electrons
• Protons and neutrons
• Electrons and neutrons 

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Charges that are different ________ each other

• Repel
• Attract

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In static electricity, charges

• Flow continuously 
• Flow intermittently 
• Build up in an atom
• Build up on an object

A region around charged objects where the object´s electric force is exerted on other charged objects is an electric: 

• Field
• Outlet
• Socket
• Power plant 

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