Game Preview

Focus 4 7A

  •  English    3     Public
    Vocabulary
  •   Study   Slideshow
  • A chemical substance which can burn things if it’s strong. (Its pH value is lower than 7).
    -
  •  15
  • The most important award given to scientists is the Nobel ......
    -
  •  5
  • The central part of an atom.
    -
  •  15