Have you ever felt a tiny zap from a doorknob after walking across carpet? That is static electricity at work, and it is the perfect entry point into how circuits flow. In this set, fourth graders fix sentences about electrons rubbing between objects, switches opening to break a circuit, and why parallel bulbs stay lit when one burns out.
You will name the load in a circuit, explain why a balloon sticks to a wall after rubbing, and trace what happens inside a flashlight when the switch flips on. By the end, the rule clicks: electricity needs a complete loop and the right charge difference to do work.
Style:
Electricity and Circuits
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
Static electricity happens when protons move from one object to another by rubbing.
Rewrite: Static electricity happens when electrons move from one object to another by rubbing, causing one object to become negatively charged and the other positively charged.
2. Fix the sentence:
A switch must stay closed for a circuit to stop working and turn off a light.
Rewrite: A switch must be opened to break the circuit and turn off a light; closing the switch allows electricity to flow again.
3. Fix the sentence:
In a parallel circuit, if one light bulb burns out, all the other bulbs go out too.
Rewrite: In a parallel circuit, if one light bulb burns out, the other bulbs stay on because each bulb has its own separate path for electricity.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. When you shuffle your feet on carpet and then touch a doorknob, you feel a shock from static electricity.
2. Every circuit needs an energy source, wires, and a load such as a bulb or motor.
3. Objects with the same electrical charge repel each other.
4. A battery is a device that stores chemical energy and converts it to electrical energy.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Why does a balloon stick to a wall after you rub it on your hair?
Rubbing the balloon on your hair transfers electrons to the balloon, giving it a negative charge. The charged balloon attracts the positive charges in the wall, which makes it stick.
2. Describe what happens inside a flashlight when you flip the switch to the ON position.
Flipping the switch closes the circuit, creating a complete path from the battery through the wires to the bulb and back. Electricity flows through the bulb, which converts the electrical energy into light.
Electricity and Circuits
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
Static electricity happens when protons move from one object to another by rubbing.
Rewrite: Static electricity happens when electrons move from one object to another by rubbing, causing one object to become negatively charged and the other positively charged.
2) Fix the sentence:
A switch must stay closed for a circuit to stop working and turn off a light.
Rewrite: A switch must be opened to break the circuit and turn off a light; closing the switch allows electricity to flow again.
3) Fix the sentence:
In a parallel circuit, if one light bulb burns out, all the other bulbs go out too.
Rewrite: In a parallel circuit, if one light bulb burns out, the other bulbs stay on because each bulb has its own separate path for electricity.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) When you shuffle your feet on carpet and then touch a doorknob, you feel a shock from static electricity.
2) Every circuit needs an energy source, wires, and a load such as a bulb or motor.
3) Objects with the same electrical charge repel each other.
4) A battery is a device that stores chemical energy and converts it to electrical energy.
★ Part C: Short Answer
Answer each question in one or two complete sentences.
1) Why does a balloon stick to a wall after you rub it on your hair?
Rubbing the balloon on your hair transfers electrons to the balloon, giving it a negative charge. The charged balloon attracts the positive charges in the wall, which makes it stick.
2) Describe what happens inside a flashlight when you flip the switch to the ON position.
Flipping the switch closes the circuit, creating a complete path from the battery through the wires to the bulb and back. Electricity flows through the bulb, which converts the electrical energy into light.
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15-20 minutes
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