Introduction to Environmental Science

2. The outermost layer of the Earth's crust.
3. The study of how living organisms interact with each other and their environment.
6. The process by which plants convert sunlight into energy.
7. The layer of gases surrounding the Earth.
10. The gradual change in species composition in an ecosystem over time.
13. The study of the relationships between living organisms and their environment.
14. The process of breaking down rocks into smaller particles through physical or chemical means.
16. The layer of Earth where all life exists, including land, water, and air.
17. A measure of the acidity or alkalinity of a solution.
18. The variety of different species in a specific area.
19. The process of Earth's average temperature increasing due to human activities.
20. A substance that reduces the pH of a solution, often harmful to aquatic life.

1. The natural process of replacing or restoring ecological communities.
4. The gradual transformation of a community over time due to natural disturbances.
5. The continuous movement of water on, above, and below the surface of the Earth.
8. The conversion of complex organic materials into simpler compounds by decomposers.
9. The study of the distribution and abundance of organisms in different places.
11. The process of soil particles being carried away by wind or water.
12. The natural home or environment of an organism.
15. The total variety of living organisms in an ecosystem.