Across
- 3. of the basic elements of any living thing.
- 6. the speed at which light travels
- 7. electrical force linking atoms
- 9. electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength
- 13. outer layer that surrounds a cell, letting substances in
- 14. small rocky body orbiting the sun
- 16. Zero -The temperature at which molecular energy is at a minimum
- 20. radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
- 26. -The rate at which velocity changes over time; an object accelerates if its speed, direction, or both change
- 28. number of protons in the nucleus of an atom
- 29. the smallest of the particles that make up an atom
- 32. lines of force surrounding a permanent magnet or a moving charged particle
- 33. a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy.
- 34. natural scientist who formulated a theory of evolution by natural selection (1809-1882)
- 36. a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
- 37. a wave that transmits sound
- 38. displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving toward the observer
Down
- 1. negatively charged ion
- 2. a scale of temperature on which water freezes at 32° and boils at 212° under standard conditions
- 4. a chemical element is an atom that has a different number of neutrons
- 5. theory that the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature
- 8. -Any elements from group 1 on the periodic table
- 10. the circular motion that happens when warmer air or liquid rises, while the cooler air or liquid drops down
- 11. a physical force of being pushed.
- 12. ion-a positively charged atom of hydrogen; that is to say, a normal hydrogen atomic nucleus
- 13. a strand of DNA that is encoded with genes.
- 15. helix that genes are made of.
- 17. region of space having a gravitational field so intense that no matter or radiation can escape
- 18. uniform microwave radiation remaining from the
- 19. a type of energy an object has because of its position
- 20. radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
- 21. an atom or particle with a positive or negative electrical charge.
- 22. change in the apparent frequency of a wave as observer and source move toward or away from each other
- 23. metal -Any element from group 2 on the periodic table
- 24. the force that attracts a body toward the center of the earth, or toward any other physical body having mass
- 25. a positive electrical charge atom.
- 27. strength or energy as an attribute of physical action or movement
- 30. atom with no charge, or is "neutral."
- 31. part of the cell containing DNA and RNA and responsible for growth and reproduction
- 34. positively charged ion
- 35. basic unit of a chemical element.