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Science for Leonardo 4 pages

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  • What is a force?
    A push or a pull.
  • Do most forces need contact between objects?
    Yes
  • When does friction occur?
    When two surfaces touch
  • What does a magnet have?
    a North Pole and a South Pole
  • What surfaces don't create lots of friction?
    smooth surfaces - ice
  • What does friction produce? plus example
    heat - rubbing your hands together
  • What materials are not attracted to magnets?
    Brass, aluminum and wood
  • What can forces make you do?
    1. speed up, 2. slow down, 3. change direction, 4. change shape
  • What surfaces create lots of friction? plus example
    rough surfaces - roads
  • In order to travel faster through air how should your shape be?
    streamlined
  • Is friction a force?
    yes
  • Do magnetic forces need contact or can they act at a distance?
    At a distance - don't need contact.
  • Do two south poles or two north poles attract or repel?
    repel
  • Do a North and South Pole attract or repel each other?
    attract
  • What does air resistance do to moving objects?
    slows them down
  • Is it easy to run in water?
    No, human bodies are not streamlined.
  • In order to travel slower through air, what do you need?
    a large surface area
  • What does water resistance do to moving objects?
    slows them down
  • Name two animals which have streamlined bodies.
    sharks and fish
  • What materials are attracted to magnets?
    Iron and steel