Across
- 2. Which part of the earth provide us land over which we live?
- 4. The uppermost part of the lithosphere
- 8. The sphere of air whcih envelops the Earth.
- 10. Which is known as our basic life support system?
Down
- 1. A situation or condition in which an organism lives.
- 3. Who are capable of modifying environments?
- 5. How many spheres are there in our environment?
- 6. Which planet called the Blue planet?
- 7. Who is the most important component of the biological environment?
- 9. What is known as vast expanse of saline water on the Earth's surface?