Trackball

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/trackball

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is a trackball?A trackball is a computer input device that looks like a mouse turned upside down. You spin a big ball on top to move the cursor on the screen.
2. How does a trackball move the cursor?When you turn the ball, sensors inside read how fast and in which direction it rolls. That information tells the computer to move the cursor the same way.

Human-Computer Interaction (HCI): The study of how people design, implement, and use interactive computing systems.
Repetitive Strain Injury (RSI): An injury to the body caused by repeated motions, often associated with prolonged computer use.
Phenolic Resin: A hard, dense synthetic material often used for durable, low-friction components like trackball spheres.