Unit 1 Environmental Sys

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Across
  1. 1. The gaseous layer surrounding the Earth
  2. 3. All the water on Earth, including oceans, rivers, and lakes
  3. 4. A well-substantiated explanation of an aspect of the natural world
  4. 8. All regions of Earth that support life
  5. 12. The movement of the Earth’s plates that can cause earthquakes and volcanoes
  6. 14. A variable that is changed by the independent variable
  7. 17. The group that does not receive the experimental treatment and is used for comparison
  8. 18. The water in all its forms, including glaciers and ice caps
Down
  1. 2. Large areas characterized by climate and plant life on land
  2. 5. An educated guess that can be tested through experimentation
  3. 6. A variable that is changed or controlled to observe its effect
  4. 7. Cycles related to non-living components of ecosystems, like water and nutrients
  5. 9. A tool used to identify organisms based on a series of choices
  6. 10. A conclusion drawn based on evidence and reasoning
  7. 11. Species that are non native, spread rapidly and cause harm to new environments
  8. 13. The solid part of the Earth, including rocks and minerals
  9. 15. The complete disappearance of a species from the Earth
  10. 16. Variables that are kept the same to ensure a fair test