Concept 1.3 &2.1 prim 5

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Across
  1. 4. amount of matter in an object
  2. 5. Space occupied y an object
  3. 7. returning back of habitat to its natural state
  4. 8. corals turn white
Down
  1. 1. human activity that decrease fish
  2. 2. flying living organisms that feed on microorganisms
  3. 3. area in the sea where scientists take care of small coral reefs
  4. 6. anything that has mass and volume