We sent you SMS, for complete subscription please reply. Follow Twitter Instagram Facebook. How does an eraser work? What is graphite? Who invented the eraser? Tags: See All Tags carbon , eraser , friction , graphite , lead , paper , pencil. Not quite… now where did I put that eraser? Wonder What's Next? Try It Out Erasers help us correct our mistakes, but did you realize they can also be used to make all sorts of interesting crafts? Take a look at the following art projects, and choose one or more to try: When you're finished, email or send us a letter with a picture of your eraser art project!
Did you get it? Test your knowledge. Wonder Words graphite logical scientific lead mineral carbon softener abrasive Take the Wonder Word Challenge. Join the Discussion. Calvin Nov 14, Nov 15, Thanks so much! We'll get that corrected. I didn't think that an eraser had that much to it.
Mar 5, Sep 10, This is so unbelievably cool! I can't believe that the graphite sticks to fiber in the paper and the ingredients in the eraser loosen the graphite to the point where it's able to grab hold of the graphite and keep it their.
Nov 4, Tung tung May 28, This is the most amazing and special piece of information about eraser I've ever seen. Thanks for the help! Good info for my home work. May 31, Koenig Dec 4, This is a great little article. I'd love to see an electron microscope series of an eraser "picking up" graphite particles. Wonderopolis Dec 4, Aparajita Guha Jun 30, I wish there was one eraser which would erase our parents' mind so that they won't remember our mischievous deeds.
Wonderopolis Jun 30, Troy Oct 16, I think it is really weird that people used to erase with white bread instead of rubber.
Don't you think that is weird? Wonderopolis Oct 17, Elango Sep 29, I started reading the wonderopolis recently and it amazes me everyday: Now i am started looking at the past ones which i missed out. Thanks for sharing the wonderful information daily. Wonderopolis Sep 30, Wonderopolis Sep 12, Hey cool, glad my little stop-motion countdown could help illustrate your post.
Wonderopolis Aug 16, Sister Jane Aug 10, I just completed a Thinkfinity seminar on Monday so I have just recently been introduced to the marvels of Wonderopolis! I will inservice the other teachers about this great website and we will introduce Thinkfinity with Wonderopolis to all of the parents on Back to School Nite!
Wonderopolis Aug 10, Andrea Keller Aug 9, I am So excited about using Wonderopolis this year for so many reasons! Teaching children with autism and other very special needs I am always looking for something that will help in telling stories, imagining, and using descriptive words. I can't wait to use Wonderopolis and see what thoughts I can get my students to express! Wonderopolis Aug 9, We appreciate all of our educator Wonder Friends and are grateful for the thought and time that went into your ideas!
Dee Sypherd Aug 9, I'm really excited about the inquiry and vocabulary aspects of Wonderopolis! I plan to use it for cooperative learning team building opportunities. Teams will read the initial question and work together to make predictions before reading the article. After teams share their ideas, they will read the article.
Teams or individuals will use the vocabulary list to pick a word for their word collection. On occasion, we will also use the day's topic as a springboard for further investigation! Erin Gannon Aug 9, As a school with a health focus, we take time out every day to share a healthy snack. While the food is handed out, we read over the Wonder together. As the kids eat, they talk about it at their tables.
The discussions are always great! If the subject really strikes a chord, we tweet the kids' opinions or spend some time writing in our journals about it. Suzanne Aug 8, I like to use Wonderopolis for my Challenge Question -- I post "Wonders" and let my students go look up the answers -- great for research and discovery of an amazingly Wonderful site!
To give the eraser color, chemists add various dyes. It seems like the eraser might be eliminating the graphite on the page. The truth is, the way erasers actually work is a bit counterintuitive. When you rub an eraser on a pencil-marked piece of paper, you produce heat through friction. When the rubber molecules get hot, they become sticky. The graphite molecules start mingling once again — this time with the sticky eraser molecules.
For more information on the workings of an eraser, check out the following links:. Erasersworld: Structure of Erasers. Obviously, erasers contain volatile chemistry and thus are able to dry-out and become stiff and non-usable. Remember erasable-ink pens? Erasable inks may not be as popular today as they were in the s, but if you're looking for an erasable ink product, they're still out there. Erasable inks contain liquid rubber cement, which means that unlike traditional inks, these will stick to an eraser if you erase them within 10 hours of writing otherwise the rubber hardens and can no longer be lifted from the paper.
Products like magic erasers can take marks off of a number of surfaces, but give your standard pink pencil eraser a try on some of those scuffs. You might be surprised at how effective it can be at erasing more than just pencil marks. About 75 percent of the pencils sold in America are painted yellow [source: Ritter ]. I learned something new about pencils while researching this article. No, not that pencil lead isn't lead I knew that fact already ; rather I learned about the pencil sandwich -- the industry term used to describe how pencil wood is placed around the graphite insert.
I did, however, also learn that there's a reason I prefer a soft, kneaded eraser over erasers of any other flavor: It actually does the job you expect an eraser to do. Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar.
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