1. Which answer best completes the following sentence?
_____ is an example of physical change while _____ is an example of a chemical change.

A. Freezing water, boiling nitrogen
B. Breaking a pencil, rusting of iron
C. Burning wood, dissolving salt in water
D. Bending a piece of aluminum, condensing water vapor

2. Gold is a rare metal that is often blended with other metals to lower the cost of jewelry or art. What physical property of gold could help you determine if a piece is pure gold?

A. density
B. mass
C. oxidation
D. reactivity

Question

1. Which answer best completes the following sentence?
_____ is an example of physical change while _____ is an example of a chemical change.

A. Freezing water, boiling nitrogen
B. Breaking a pencil, rusting of iron
C. Burning wood, dissolving salt in water
D. Bending a piece of aluminum, condensing water vapor

2. Gold is a rare metal that is often blended with other metals to lower the cost of jewelry or art. What physical property of gold could help you determine if a piece is pure gold?

A. density
B. mass
C. oxidation
D. reactivity

anonymous · Answer

1 IS A
2 IS B