Put these sentences in order to describe how the ocean bottom has a reduced level of oxygen in a
dead zone.
1. Algae blooms die and sink to the bottom of the ocean.
2. Fertilizer is added to land to increase plant growth.
3. Bacteria feed on the algae and use up the dissolved
oxygen in the ocean.
4. When it rains fertilizer is washed from land and enters
the rivers and oceans.
5. Algae feed on the fertilizer and form massive BLOOMS.
