Across
- 3. - Combination of different substances.
- 5. - Long-term pattern of weather in a particular region.
- 7. - Region of Earth near the equator with a warm climate.
- 11. - Group of atoms bonded together.
- 12. - Mass per unit volume of a substance.
- 13. - Study of the relationships between living organisms and their environment.
- 17. - Rock formed from the cooling of molten lava or magma.
- 19. - Compounds containing carbon atoms.
- 20. - Study of the structure of living organisms.
- 21. - Substance composed of atoms with the same number of protons.
- 22. - Group of organisms that can interbreed and produce fertile offspring.
- 25. - Object that produces a magnetic field.
- 28. - Opening in the Earth's crust that allows magma to escape.
- 29. - Study of matter and energy.
- 30. - Natural environment where an organism lives.
Down
- 1. - Energy of motion.
- 2. - Tissue in plants that transports sugars.
- 4. - Atoms of the same element with different numbers of neutrons.
- 6. - Study of living organisms.
- 8. - Relating to genes and heredity.
- 9. - Subatomic particle with no electric charge.
- 10. - Quantities with both magnitude and direction.
- 14. - Force that attracts two objects with mass toward each other.
- 15. - Tissue in plants responsible for secondary growth.
- 16. - Process of cell division resulting in two identical daughter cells.
- 18. - Biological molecules that speed up chemical reactions.
- 23. - Subatomic particle with a positive electric charge.
- 24. - Study of interactions between organisms and their environment.
- 26. - Central part of an atom containing protons and neutrons.
- 27. - Region in an atom where an electron is likely to be found.