Human dependent on natural resources

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Across
  1. 2. the layer of gas surrounding of a gas surrounding a planet that is held in place by gravi
  2. 7. Resources that exist in the environment without human interaction
  3. 8. Replaceable by natural in a short period of time
  4. 9. A source of a supply or energy
Down
  1. 1. Not replaceable by natural means within a short period of time
  2. 3. The sum of all living matter on Earth
  3. 4. Something that us needed by organisms and is not infinite in its abundance in the environment if it is exhausted then the organisms that need it cannot survive
  4. 5. Water that collects in cracks and pores in underground soil and rock layers
  5. 6. Any natural process that happens to Earths surface, such as weathering erosion or plate tectonics