Answer Key of Worksheet No 2

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Answer Key of Worksheet No.2
Identify the letter of the choice that best completes the statement or answers the question.
Part I: Multiple Choices
1. (Physical or Chemical) properties of a substance can be observed.
a. physical
2. One can use their five senses to determine the (Physical or Chemical) properties of a
substance.
a. physical
3. ( Physical or/and Chemical ) properties usually describe how a substance reacts.
b. chemical
4. ( Physical or/and Chemical ) properties are not as easy to observe.
b. chemical
5. ( Physical or/and Chemical ) properties can be used to identify substances.
a. physical and chemical
Part II: Matching
a. physical
b. chemical
__a___ 1. Oxygen is odorless and colorless.
__b___ 2. Copper turns green when exposed to the environment.
___a__ 3. The piece of metal is magnetic.
___a__ 4. The density of water is 1.0 gram per cubic centimeter.
___a__ 5. Diamonds are a very hard substance.
___a__ 6. The tree is 8 meters high.
___b__ 7. Sodium reacts very easily with other elements.
___a__ 8. Copper conducts electricity.
__a__ 9. Water is a liquid.
___a__ 10. The mass of the NaCl sample is 30 grams.
___b__ 11. Gold is nonflammable.
___b__ 12. Alka-Seltzer tablets react with water to produce gas.
___a__ 13. The color of the ball is red.
___b__ 14. Iron reacts with oxygen and forms rust.
___a__ 15. The boiling point of water is 100 degrees C.
___b__ 16. Baking soda reacts with vinegar.
___b__ 17. The gas is flammable.
___b__ 18. The silver spoons tarnished and turned dark.
___a__ 19. Diamonds are a shiny.
___b__ 20. Argon is not very reactive.
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