Across
- 1. The process by which plants make their own food using sunlight.
- 4. The study of living organisms and their interactions with the environment.
- 5. The layer of Earth where all life exists.
Down
- 2. The practice of washing hands to prevent the spread of germs.
- 3. A book that tells a story, often with characters and a plot.
- 6. The organ in the human body that pumps blood.