Science corner.How You Tear It Ask for permission to tear a sheet of newspaper. Tear it from the top edge. Then tear it from a side edge. Was one tear straighter than the other? How You Tear It--Newsprint (the kind of paper used For newspapers) is made by spreading wet wood fibers over a flat screen and shaking the screen From side to side. The shaking makes many of the long Fibers line up in one direction. When the Fibers dry, they stick together side by side. When you tear the paper, it's easier to pull the Fibers apart lengthwise length·wise adv. & adj. Of, along, or in reference to the direction of the length; longitudinally. Adj. 1. lengthwise , like strings of licorice licorice (lĭk`ərĭs, –rĭsh), name for a European plant (Glycyrrhiza glabra) of the family Leguminosae (pulse family) and for the sweet substance obtained from the root. , than it is to pull the other way and break the Fibers. What Did This? By Timothy Loftus Fancy designs like these often lie under the bark of dead trees. What do you think makes them? What Did This?--The designs are the tunnels of bark beetles and their larvae Larvae, in Roman religion Larvae: see lemures. . These insects spend most of their lives under the bark of dead trees. Adult beetles bore through the bark and create tunnels, where they lay eggs. AFter the eggs hatch, the larvae feed on the wood, creating more tunnels as they grow. They stay under the bark as they go through the quiet stage of pupation pu·pate intr.v. pu·pat·ed, pu·pat·ing, pu·pates 1. To become a pupa. 2. To go through a pupal stage. pu·pa in which they change into their adult Form. As adults, they leave the tree to Find mates. The cord has two separate wires inside. They carry electricity to the light bulb. If the bare wires touched each other, the electricity would take a shortcut (1) In Windows, a shortcut is an icon that points to a program or data file. Shortcuts can be placed on the desktop or stored in other folders, and double clicking a shortcut is the same as double clicking the original file. between them. The spot where they touched would get very hot and could start a Fire. Don't touch an electrical cord if you see its bare metal 1. bare metal - New computer hardware, unadorned with such snares and delusions as an operating system, an HLL, or even assembler. Commonly used in the phrase "programming on the bare metal", which refers to the arduous work of bit bashing needed to create these basic tools wire. It could give you a dangerous shock. |
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