11-8 Physical and Chemical Changes
- 1. Wind erosion of rocks.
A) Chemical
B) Physical
- 2. Food digesting in your body.
A) Chemical
B) Physical
- 5. Copper penny turning dark.
A) Chemical
B) Physical
- 6. Color changing in leaves.
A) Chemical
B) Physical
- 12. Explain the difference between a physical and a chemical change.
- 13. If you could measure the oxygen consumed and the gasses released by burning a candle, you would observe that the total mass of material remains the same as before the candle was lit. What law does this example describe?
- 14. List three examples of physical changes.
- 15. List three examples of chemical changes.
- 16. Physical changes involve changes in ____________.
A) appearance
B) taste
C) radiation
D) sunlight
- 17. A common physical change occurs when matter changes from one ____________ to another.
A) country
B) appearance
C) energy
D) state
- 18. One example of a physical change is when liquid water changes to a solid, forming __________.
A) gas
B) copper
C) melting
D) ice
- 19. One easy way to determine if a physical change has taken place is to note changes in size or ____________.
A) gas
B) freezing
C) shape
D) energy
- 20. When a chemical change takes place, a substance is changed into a _____________ substance.
A) cute
B) ugly
C) same
D) different
- 21. Two examples of chemical changes are fireworks explosions and leaves ______________.
A) falling off the tree
B) blowing in the wind
C) changing color
D) staying green
- 22. A sign of a chemical change is the release or gain of __________.
A) radiation
B) energy
C) looks
D) appearance
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