Science Crossword Puzzle Ecosystems Unit 2

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Across
  1. 2. Words
  2. 4. — made of many cells.
  3. 6. — made of one cell.
Down
  1. 1. — the basic units that make up living things.
  2. 3. energy — energy stored in the bonds of molecules, such as food.
  3. 5. respiration — the process cells use to release usable energy from food.