A World Without Trees

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Across
  1. 5. The process plants use to create oxygen and sugar (energy).
  2. 6. To cause to grow or develop
  3. 7. Take in the sunlight to begin photosynthesis
Down
  1. 1. The part of a plant cell that makes plants green. This is also where photosynthesis happens
  2. 2. A type of variable that causes something to happen
  3. 3. A type of variable that shows the effect of an experiment
  4. 4. Where a plant takes in water from the soil.