Across
- 3. are what make up DNA (A T G C)
- 6. changes change the form of a substance but never its formula
- 8. compounds share electrons
- 10. is the measure of the speed of moving particles
- 11. are the smallest part of an ionic compound
- 12. are the smallest part of a covalent compound
- 13. are made up of hundreds or thousands of smaller units called amino acids
- 16. are the chemicals that are on the right of a chemical equation
- 18. are the chemicals that are on the left of a chemical equation
- 20. reactions feel cold because they pull energy out of whatever they are near to
- 22. changes produce a whole new substance or chemical
- 23. are the smallest part of an element
- 24. motion is caused by the collisions between particles
- 25. always make ionic compounds
- 26. help a chemical reaction to happen by lowering the activation energy it takes to begin a chemical reaction.
Down
- 1. reactions feel hot because they put out a lot of energy
- 2. attraction is the reason ionic compounds stick together
- 4. _______, such as animals, can’t make their own energy
- 5. include substances like fats and oils
- 7. is the tendency of energy to spread out
- 9. can be recognized by the fact that their chemical formula begins with H (hydrogen)
- 13. Because water is ________, they have a lot of attraction one from anoter
- 14. compounds transfer (give/take)
- 15. is NOT an element as it is made of iron and carbon.
- 17. are the structure that ionic compounds are made from
- 19. is the study of matter and the changes in matter
- 21. bond to make covalent compounds
- 24. can be recognized in that their chemical formulas end with OH (hydroxide)