I am sure you have seen your mother or sister using it, or if you are a girl, you probably have one tucked somewhere for special occasions. Lipstick is that waxy crayon-like cosmetic in a tube-like container used to colour lips.
Women love their makeup, and out of the hundreds of makeup products, nail polish is on the top five of their list. Nail polish today has become a significant part of women's fashion and nail care. These small bottles of coloured nitrocellulose have become a symbol of the 20th century, with more than half the women using it.
Have you ever seen that little Post-it note that your dad uses? That square yellow paper that he uses to makes notes on and pastes it to books and newspapers, or even on the refrigerator. Isn't it interesting how you can stick it somewhere then remove it easily and stick it somewhere else entirely?
Ink is a pigment or dye that is used for colouring a surface in order to produce an image or a text. You use ink in many ways, whether it is the ink in your ballpoint pen, your father's special fountain pen or the ink used in your printer cartridge.
An eraser is an instrument of stationery used to remove pencil and sometimes pen marks. It is rather interesting to know that before the invention of erasers slabs of wax and breadcrumbs were used to 'wipe out' charcoal or lead marks from paper. Can you imagine doing that in the classroom? The first pencils were discovered around 1560's but people did not have anything that could rub out the marks with.
Sun is the life giver to everything on earth. Plants, animals and humans spring to life with the touch of the first sunrays. The sun's energy or solar energy is a form of renewable energy received from the Sun in the form of solar radiation. This energy can be used to produce solar electricity.
Dams are huge concrete constructions built to store water. You must have definitely seen one while traveling between cities. They are used to control flood hazards, store water for irrigation, and produce hydroelectric power. These are the benefits of a dam. But did you know they are also harmful in many ways?
Adhesive tape is a tape that is coated with adhesive either on one side or both, and used for temporarily or permanently joining two overlapping materials. Adhesive tape is something we all use in our daily lives. It serves a number of purposes. Its convenience makes it virtually indispensable in our homes and while at work. If for example, you accidentally tear an important document at work, you reach for an adhesive tape to fix it in a jiffy. Though this invention has become indispensable in our lives, have you ever thought about what is the science behind this invention?