Trimester 1 Review: Earth Science

Edit Answers
1234567891011121314151617181920
Across
  1. 3. When humans use fossil fuels that go directly into the atmosphere
  2. 6. of Mass The number of elements of the each side of the equation must be the same
  3. 9. Process that plants go through to make their own food. Requires Carbon dioxide, water and sunlight energy and makes oxygen, glucose (food for plant) and water vapor.
  4. 11. Breathing
  5. 13. A reaction that releases energy in the form of heat
  6. 14. Number The number above the element also gives amount of Protons and electrons
  7. 16. When plants or animals die and go into the ground
  8. 17. Formed between metals and non-metals gain or loss of electrons
  9. 18. When the clouds are formed
  10. 19. When water goes into the ground
  11. 20. A particle that is electrically charged (positive or negative)
Down
  1. 1. When it rains
  2. 2. Formed between tow non metals sharing 2+ electrons
  3. 4. System Matter cannot enter or leave the system
  4. 5. A reaction that ABSORBS energy in the form of heat
  5. 7. Atoms of the same element that differ in the number of neutrons they contain
  6. 8. When plants put water back into the atmosphere
  7. 10. When the water runs of the land into a nearby lake or stream
  8. 12. System Matter can enter and leave the system
  9. 15. a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)