1. solid air fresheners gradually shrink because they undergo sublimation
a. true
b. false

2. complete the sentence by using word carbon dioxide, carbon or water vapor.
the \fake\ fog produced on a stage forms when solid ______ sublimes.

answer:

3. fill in the blank(s):
______________ is the process in which a solid changes directly to a gas without going through the liquid state.

4. which of the following substances changes directly from a solid to a gas at room temperature?
a. naphthalene
b. water ice
c. snow
d. two of the above

5. the substance commonly referred to as dry ice is solid ______.
a. oxygen
b. ammonia
c. nitrogen
d. carbon dioxide

Question

1. solid air fresheners gradually shrink because they undergo sublimation
   a. true
   b. false

2. complete the sentence by using word carbon dioxide, carbon or water vapor.
   the \fake\ fog produced on a stage forms when solid ______ sublimes.

answer:

3. fill in the blank(s):
   ______________ is the process in which a solid changes directly to a gas without going through the liquid state.

4. which of the following substances changes directly from a solid to a gas at room temperature?
   a. naphthalene
   b. water ice
   c. snow
   d. two of the above

5. the substance commonly referred to as dry ice is solid ______.
   a. oxygen
   b. ammonia
   c. nitrogen
   d. carbon dioxide

Accepted Answer

### Question 1
# Brief Explanations:
Solid air fresheners (like those with naphthalene or other sublimable solids) shrink over time because the solid directly turns to gas (sublimation), so the statement is true.
# Answer:
A. TRUE

### Question 2
# Brief Explanations:
Stage "fake" fog is made using dry ice, which is solid carbon dioxide. When solid carbon dioxide sublimes (turns to gas), it cools the air, causing water vapor to condense, but the subliming substance is solid carbon dioxide.
# Answer:
carbon dioxide

### Question 3
# Brief Explanations:
The process where a solid changes directly to a gas without passing through the liquid state is defined as sublimation.
# Answer:
Sublimation

### Question 4
# Brief Explanations:
- Naphthalene (in mothballs) sublimes at room temperature.
- Water ice (and snow, which is frozen water) melts to liquid water at room temp, not sublime (though snow can sublime in some conditions, but naphthalene is a clearer example of sublimation at room temp; however, the option "d. two of the above" is correct because naphthalene sublimes, and snow/ice can also sublime (sublimation of ice is called desublimation in reverse, but ice does sublime at low pressures, like in cold dry air). So naphthalene and snow/ice (water ice) can sublime, so two of the above.
# Answer:
d. two of the above

### Question 5
# Brief Explanations:
Dry ice is the common name for solid carbon dioxide ($CO_2$). Oxygen, ammonia, and nitrogen in solid form don't have the common name "dry ice".
# Answer:
d. carbon dioxide

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