Chain Crosswords Short Nature Easy — Set 22

Easy 11×11 Set 22
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7
Across
  1. 2. The force that makes magnets attract or repel
  2. 5. The tiny building block that makes up all living things
  3. 6. The force that slows things down when they rub together
  4. 7. A tiny particle of light energy
Down
  1. 1. A pattern of energy moving through space or matter
  2. 3. The slow process of living things changing over many years
  3. 4. The amount of matter in an object