STATIC ELECTRICITY. II. Directions:Answer the following questions with short answers. Use the back of this sheet to write your answers.

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1 1 Pre-Test I. Directions: Circle the word that completes the sentence. 1. The "building blocks of matter" are called neutrons atoms electrons. 2. When charged objects jump apart we say they each other. 3. The part of an atom with a negative charge is called the proton. neutron. electron. 4. Objects that have opposite charges come together because they each other. 5. When two objects rub and gain or lose electrons it is called static electricity. current electricity. magnetism. II. Directions:Answer the following questions with short answers. Use the back of this sheet to write your answers. 1. What are the three parts of an atom and what are their charges? 2. Why do we sometimes get a shock after walking across a carpeted floor and touching a metal doorknob? 3. How can we get balloons to stick to a wall? 4. Here are two pith balls hanging near each other. What can you tell about them? 5. Here are two more pith balls hanging near each other. What can you say about them?

2 2 Video Quiz Directions: At the end of the program there is a quick quiz. You can answer the questions on this sheet. 1. A proton is found in the center of an atom and it has a electrical charge. a. negative b. positive c. neutral 2. An electron is found orbiting the center of the atom and it has a electrical charge. a. negative b. positive c. neutral 3. Like charges. a. come together b. attract c. repel d. cancel each other out 4. Lightning happens because of the up and down movement of. a. dust and snow b. rain and snow c. rain particles 5. When two pith balls each have a build up of electrons what happens? a. They stick together. b. They jump away from each other. c. Nothing. d. They attract each other.

3 3 Word Search Directions: There are 12 words scattered throughout this puzzle. They are listed below. See how many you can find. They may be written diagonally, horizontally, or vertically. A V E T C H A R G E S I P V W R C T N L A D F X O P Q B J H G N D F G H S D O T N R H W T P O I P B C X W R L K M W O T Y H U S C H G R E S P R O T O N G W I T E R E A S M P I C R E O T U J L S E F H L T O E B M C E M I P T L E C Z U O J L G M R S G U O R G R T H E J S K S M K G O R O P E H W I O P L K J H E S C M W O S E L S C P I R V B E A L P H T C A C H J T R S K I T X R I C M H A P S T A T I C L A T T R A C T S A G K P O M N E T N E M U G B E T M R S I C O P P I E R H L R T R I B W E M X C G A I P B M M A S T O G V D R I S V O C R S I R I G I E C B E T P L V N M I R T S E N I E F W T R E P E L S C S A M O R C G H E I K H L G S P R O K E N L F G I P R W M H J I B T I O R M K L H A S I P N V M N I P R T S A G E C V B R O S T R L O O K H R W O P A C I P E B R T I S P R E X G M I H W R A Y N O M I R T E W G C O P N H E T E I P B C H M E Y O B V T R A L B R P T S H I E O C B P W M T Here are the words to look for: CHARGES REPEL ELECTRON ATTRACT NEGATIVE ATOM STATIC SHOCK POSITIVE PROTON ELECTRICITY LIGHTNING

4 4 Charging Objects Purpose: To show how static charges act towards each other. Materials: 1. thread 2. two plastic foam balls 3. plastic comb 4. wool cloth 5. tape Procedures: 1. Cut two pieces of thread about 10 inches long. 2. Tape one thread to each of the plastic foam balls. 3. Hang one of the balls from the edge of a table. Tape the thread so that the ball hangs freely. 4. Rub the comb with the wool cloth many times. 5. Bring the comb near the foam ball. Write down what you see happen in the Observation section. 6. Repeat steps 4 and 5 a few times and record observations. 7. Hang the second foam ball next to the first so that they touch. 8. Rub the comb with wool again and bring it close to the first ball to charge it with electrons. (When the wool rubs the comb, electrons from the wool go into the comb). 9. Rub the comb and touch both foam balls with it. Observations: 1. What does the single foam ball do when the charged comb is brought near? 2. What happens when the charged comb is brought near the ball many times? 3. What happens when a second ball is hung near a charged ball? 4. What happens if both foam balls are charged?

5 5 Balloon Fun Directions: Try these different experiment to observe the behavior of static electricity. 1. Rub a balloon in your hair for about 15 seconds. Touch the balloon to a smooth wall and let go. 2. Rub a balloon in your hair. Then while looking in a mirror bring the balloon close to your hair. 3. Rub a balloon with a wool object or in your hair. Bring it close to little bits of paper. 4. Rub a balloon with a wool object or in your hair. Bring it close to a thin stream or water from a faucet. 5. Place a ruler over the edge of a table. Use a book to hold it in place. Cut a twofoot piece of string and tie a balloon to each end of the string. Tape the middle of the string to the ruler and allow the balloons to hang down next to each other. Part A: Rub one balloon in your hair. Let it fall back in place. Part B: Rub both balloons in your hair and allow them to fall back in place. What happens? How do you explain what happened in Part A and Part B?

6 6 Post-Test I. Directions: Circle the word that completes the sentence. 1. Protons Neutrons Electrons are the part of the atom that have a negative charge. 2. All things are made of the "building blocks of matter" called neutrons. atoms. molecules. 3. Objects each other when they jump apart. 4. Objects with opposite charges come together because they each other. 5. Static electricity Current electricity Magnetism is produced when two objects rub and gain or lose electrons. 6. The part of an atom that has a positive charge is called a proton. neutron. electron. II. Directions: Answer the following questions about static electricity. 1. Why will you sometimes get a shock after walking across a carpet and touching a metal object such as a doorknob? 2. If you pull a wool sweater over your head, you will often end up with a wild hairdo. Your hair is hard to comb and wants to stand up. Why?

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