• 1. 
    Mars has two kinds of motion.

  • true
  • false
  • 2. 
    A meteor would burn up more rapidly in the atmosphere of Mars than it would passing through the Earth’s atmosphere.

  • true
  • false
  • 3. 
    The path of a light ray can be bent as it travels past a massive object.

  • false
  • true
  • 4. 
    The wavelength of red light is shorter than that of blue light.

  • false
  • true
  • 5. 
    A rubber band stores potential energy when stretched.

  • false
  • true
  • 6. 
    Human skin cells divide only once.

  • true
  • false
  • 7. 
    The rings of Saturn are very thin, compared to their length and width.

  • true
  • false
  • 8. 
    Earth is a giant magnet.

  • true
  • false
  • 9. 
    Earth’s oldest known rock is about 4 billion years old.

  • true
  • false
  • 10. 
    An elephant has 100 muscles in its trunk.

  • false
  • true
  • 11. 
    Water is the most common element on Earth.

  • true
  • false
  • 12. 
    Energy can be transmitted wirelessly.

  • true
  • false
  • 13. 
    There are stars made of diamonds.

  • true
  • false
  • 14. 
    Iron is the most abundant metal in Earth’s crust.

  • true
  • false
  • 15. 
    Walking up stairs uses more energy than walking on level ground.

  • true
  • false
  • 16. 
    There are 500 stars visible to the naked eye from Earth.

  • false
  • true
  • 17. 
    Astronomers can look back in time.

  • false
  • true
  • 18. 
    The speed of sound is constant.

  • false
  • true
  • 19. 
    The plants dinosaurs ate do not exist today.

  • true
  • false
  • 20. 
    Helium gives off a pungent odor.

  • false
  • true
  • 21. 
    Hair helps us humans hear.

  • false
  • true
  • 22. 
    Snowmelt is the source of most of the world’s drinking water.

  • false
  • true
  • 23. 
    In the human body, food energy is stored in the hair.

  • false
  • true
  • 24. 
    Galaxies are classified by their shape.

  • false
  • true
  • 25. 
    Silver is the most conductive of metals.

  • true
  • false
  • 26. 
    There are more than 2,000 kinds of mosquitoes.

  • true
  • false
  • 27. 
    Apes don’t laugh.

  • false
  • true
  • 28. 
    An endangered species is at risk of extinction.

  • false
  • true
  • 29. 
    Crude oil is a fossil fuel.

  • true
  • false
  • 30. 
    The ocean sometimes stands still.

  • false
  • true
  • 31. 
    All matter has mass and density.

  • true
  • false
  • 32. 
    Skin serves no real purpose.

  • true
  • false
  • 33. 
    All chemical reactions can be reversed.

  • false
  • true
  • 34. 
    When horses run, all four feet leave the ground.

  • false
  • true
  • 35. 
    Most human babies are born exactly on their due dates.

  • true
  • false
  • 36. 
    Lightning rarely strikes skyscrapers.

  • true
  • false
  • 37. 
    Tectonic plates move very quickly.

  • false
  • true
  • 38. 
    A person would weigh more on Earth than on the Moon.

  • true
  • false
  • 39. 
    Marine organisms are largely unaffected by global warming.

  • true
  • false
  • 40. 
    Tomatoes are fruits.

  • false
  • true
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