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2. Blackboard - Wikipedia

   en.wikipedia.org/wiki/Blackboard

   Uses. Reusable writing surface on which text or drawings are made. A blackboard or a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.

3. 6 Tips for Eye Health and Maintaining Good Eyesight - WebMD

   www.webmd.com/eye-health/good-eyesight

   Look 20 feet away for 20 seconds. Get up at least every 2 hours and take a 15-minute break. 6. Visit Your Eye Doctor Regularly. Everyone needs a regular eye exam, even young children. It helps ...

4. Chalkboard scraping - Wikipedia

   en.wikipedia.org/wiki/Chalkboard_scraping

   Chalkboard scraping. Scraping a chalkboard (also known as a blackboard) with one's fingernails produces a sound and feeling which most people find extremely irritating. The basis of the innate reaction to the sound has been studied in the field of psychoacoustics (the branch of psychology concerned with the perception of sound and its ...

5. Misophonia: Symptoms, Triggers, Treatment, and More - Healthline

   www.healthline.com/health/misophonia

   feelings of annoyance, irritation, and disgust. anger, rage, or feelings of aggression, including a desire to lash out physically or verbally. nervousness or uneasiness in situations that could ...

6. Caregiving for Parents: Healthy Living Tips for Seniors - WebMD

   www.webmd.com/healthy-aging/staying-healthy

   Freeze sauces, soups, and bouillon in ice cube trays so that individual servings can be popped out and heated. Make sure that your parent or grandparent has access to lots of healthy, easy-to-eat ...

7. Chalkboard art - Wikipedia

   en.wikipedia.org/wiki/Chalkboard_art

   Chalkboard art. Children's drawing on a chalkboard. Chalkboard art or chalk art is the use of chalk on a blackboard as a visual art. [1] It is similar to art using pastels and related to sidewalk art that often uses chalk. Chalkboard art is often used in restaurants, shops or walls. [2]