OUR ENVIRONMENT

12345678910
Across
  1. 8. Energy flow in an ecosystem is ........
  2. 9. The transfer of food energy from plant sources through a series of organisms in an ecosystem is known as.......
  3. 10. The term ecosystem was introduced by ..... in 1935
Down
  1. 1. ......are mainly autotrophs
  2. 2. progressive increase in the concentration of toxic substances at different trophic levels.
  3. 3. The living organisms like autotrophs, heterotrophs form the ...... components.
  4. 4. The first ozone hole was discovered over ........
  5. 5. .....components are the non-living components
  6. 6. .........layer prevents the harmful UV rays of sun from entering to the earth’s surface.
  7. 7. ......is a network of food chains