Environmental Science

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Across
  1. 3. is the mixture of gases that makes up the air we breathe
  2. 5. is the study of interactions of living organisms with one another and with their environment
  3. 7. makes up all of the water on or near Earth’s surface
  4. 11. are people who obtain food by collecting plants and by hunting wild animals or scavenging their remains
  5. 12. is the study of chemical reactions
  6. 13. is the study of matter and energy transfer
Down
  1. 1. is the study of living things
  2. 2. countries have a rapid population growth
  3. 4. are calculations that show the productive area of Earth needed to support one person
  4. 6. is the mostly solid, rocky part of Earth
  5. 8. countries have higher incomes
  6. 9. is a key goal of environmental science.
  7. 10. is the raising of crops and livestock for food