Across
- 3. Anything that occupies space and has mass
- 5. smallest particle lf an element
- 8. these break down molecules into smaller units and release energy
- 9. is done when a force is applied to an object over a distance
- 11. A substance that can be broken down by decomposers
- 12. the unit of power
- 14. A yellow, odorless non-metal essential to proteins and ecosystems; cycles through air, land, and water.
- 15. Molecule that absorbs UV radiation
- 17. stores energy, forms cell membranes, carries messages
- 18. All regions of Earth with life
- 19. Surface flow of excess water
- 21. solution with a pH higher than 7. It tastes bitter (example is the baking soda)
- 23. the energy of electromagnetic waves, these waves can travel through space
- 25. pure substance
- 28. All organisms and their environment
- 29. a substance that forms as a result of a chemical reaction
- 31. contains two or more elements
Down
- 1. Made of amino acids, found in muscles and enzymes
- 2. Reactions that build larger molecules
- 4. Removal of nutrients by water from soil
- 6. the sum of all the biochemical reactions in an organism 5.
- 7. rate at which energy is being used
- 10. The unit of heat energy
- 13. Result of sulfur/nitrogen oxides mixing with water
- 16. ability to work
- 20. 78% of the atmosphere; must be fixed to be usable
- 22. harmful substances into nature
- 24. A solution with a pH lower than. It tastes sour (example is the vinegar)
- 26. All water on Earth
- 27. Study of Earth systems like soil and crust
- 30. Key element in all living organism