Directions: Use the information provided and your knowledge of Physical Science to answer the following questions. Show all work where necessary.
Directions: Use the information provided and your knowledge of Physical Science to answer the following questions. Show all work where necessary.
When a plastic rod is rubbed with wool or fabric, it becomes electrically charged. When held near tiny paper pieces, the paper bits jump upward and stick to the rod - even though the rod never touches them. The closer the rod gets, the more strongly the paper moves.
Electric forces can act between objects that are not touching. When you rub a plastic rod with wool or cloth, electrons move from one material to the other. This causes the rod to become negatively charged. Small paper pieces are neutral at first, but when the charged rod comes close, the electric force rearranges charges inside the paper, making the paper attracted to the rod.
This attraction gets stronger as the rod gets closer. If you hold the rod far away, the paper doesn’t move because the electric force is too weak. But if you bring the rod closer, the force becomes strong enough for the paper to lift off the table. Sometimes the paper jumps suddenly toward the rod, showing that the force can act quickly and without contact.
This phenomenon leads to important cause-and-effect questions: What happens when the rod is rubbed more times? How does distance affect how much the paper moves? Do all materials respond the same way? By observing how far the paper moves at different distances, we can learn how electric forces change depending on conditions - even when objects never touch.
Source:
https://ggebooks.com/BOOKA/2-electricity/2-8-static.php
Distance from Rod (cm) | Paper Pieces Moving (#) | Jump Height (cm) |
|---|---|---|
10 | 0 | 0 |
8 | 2 | 0.4 |
6 | 5 | 1.1 |
4 | 9 | 2.3 |
Which observation best shows that the plastic rod affects the paper without touching it?
Look at Table 1. How does the number of paper pieces moving change as the distance from the
rod decreases from 10 cm to 4 cm?
What pattern do you observe between distance from the rod and jump height of the paper pieces?
Using the data, explain why the paper pieces do not move when the rod is 10 cm away.
At which distance does the charged rod show the strongest electric effect on the paper?
What evidence shows that the charged plastic rod exerts an electric force on pieces of paper without touching them, and how does distance affect this interaction?
Claim:
Evidence:
Reasoning: