sublimation worksheet
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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
fill in the blank(s):

Question

sublimation worksheet
visit ck12.org for free online practice
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
fill in the blank(s):

Accepted Answer

### Question 1
# Explanation:
## Step1: Recall sublimation definition
Sublimation is solid to gas without liquid. Solid air fresheners (like those with naphthalene or other volatile solids) shrink as they sublime (turn from solid to gas). So the statement is true.
# Answer:
a. TRUE

### Question 2
# Explanation:
## Step1: Recall stage fog production
Stage "fake" fog is made from solid carbon dioxide (dry ice) subliming. Dry ice sublimes (solid to gas) to produce $CO_2$ gas which cools air, condensing water vapor into fog. Carbon (graphite/diamond) doesn't sublime easily at stage conditions, water vapor is gas. So the answer is carbon dioxide.
# Answer:
carbon dioxide

### Question 3
# Explanation:
## Step1: Recall the process name
The process where a solid changes directly to a gas without passing through the liquid state is called sublimation.
# Answer:
Sublimation

### Question 4
# Explanation:
## Step1: Analyze each substance
- Naphthalene: Sublimes at room temp (solid to gas, e.g., mothballs shrink).
- Water ice: Melts to liquid at room temp (0°C is melting point, room temp >0°C, so melts, not sublime).
- Snow: Similar to ice, melts to liquid water at room temp (or sublimes very slowly, but not significantly at room temp like naphthalene). So only naphthalene sublimes. Wait, but maybe I made a mistake? Wait, naphthalene sublimes, snow can sublime (sublimation of snow/ice is called sublimation, but at room temp, ice melts. Wait, the options: a. naphthalene, b. water ice, c. snow, d. two of above. Wait, naphthalene sublimes at room temp. Snow: at room temp (above 0°C), snow melts to liquid, but in cold dry air, snow can sublime. But the question is "at room temperature". So naphthalene sublimes, water ice melts, snow: if room temp is above 0°C, melts; if below, but room temp is ~20°C. So only naphthalene? Wait, no, maybe the question considers that snow can sublime? Wait, no, the standard examples: naphthalene (mothballs) sublimes, dry ice sublimes, iodine sublimes. Water ice: melts. So naphthalene sublimes, so option a. But wait, maybe the question has a different take? Wait, maybe the options are different. Wait, the options are a. naphthalene, b. water ice, c. snow, d. two of the above. Wait, maybe the question considers that snow (ice) can sublime, but at room temp, ice melts. So only naphthalene. So answer a? Wait, no, maybe I'm wrong. Wait, let's check: Naphthalene: sublimation at room temp (yes, mothballs disappear). Water ice: melts at 0°C, room temp is above 0°C, so melts. Snow: same as ice, melts. So only naphthalene. So answer a.
# Answer:
a. naphthalene

### Question 5
# Explanation:
## Step1: Recall dry ice composition
Dry ice is the common name for solid carbon dioxide ($CO_2$). Oxygen, ammonia, nitrogen: their solids don't have the name dry ice. Solid $CO_2$ sublimes at -78.5°C, producing the "fog" effect (as in question 2).
# Answer:
d. carbon dioxide

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QUESTION IMAGE

Question

Explanation:

Question 1

Step1: Recall sublimation definition

Step1: Recall stage fog production

Step1: Recall the process name

Answer:

Question 2