20-1 What Is Electric Charge?

Name: ______Block: _____Date: _____/_____/_____

20-1 What is electric charge?

Lesson Review

Complete the following.

Word Bank: Some words are used once and others are used more than once.

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Static Discharge

Neutron

Proton

Repel

Attract

Electron(s)

Neutral

Static Electricity

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1.______The buildup of electric charges in an object is called .

2.______A is an atomic particle with a positive charge.

3.______An atomic particle with a negative charge is called an .

4.______A is an atomic particle with neither a positive charge nor a negative charge.

5.______Particles called ______and are found in the
nucleus of an atom.

6.______Objects with the same electric charge each other.

7.______Objects with different electric charges each other.

8.______Most objects are electrically and do not have an electric charge.

9.______When a neutral object gains or loses , it becomes electrically charged.

10.______Lightning is an example of the loss of static electricity, which is known as .

Skill Challenge

In the space below, make a diagram of the buildup of electric charges that occurs on the ground and in a cloud before lightning strikes. Then, make a second drawing that shows what charges are present after lightning strikes. Indicate electric charges by using (+) or (–) signs. Give each diagram a title.

Before:______After:______

20-3 What are insulators and conductors?

Lesson Review

Classify each of the following as an insulator or a conductor. Write the correct term in the spaces provided.

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______1.plastic container

______2.metal ring

______3.copper wire

______4.wooden chair

______5.glass jar

______6.gold bracelet

______7.platinum wire

______8.paper bag

______9.iron nail

______10.paper clip

______11.bottle cork

______12.aluminum pot

Concepts and Challenges in Physical Science, Teacher’s Resources CD-ROM

Name Class Date

Skill Challenge

Skills: classifying, organizing

List 10 objects that you have in your kitchen at home and that ARE NOT already listed above. Classify each object as an insulator or a conductor by writing a check mark in the correct column. If an object has some parts that are insulators and some parts that are conductors, list each part separately in the Item column.

INSULATORS AND CONDUCTORS
Item / Insulator / Conductor
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.

Concepts and Challenges in Physical Science, Teacher’s Resources CD-ROM