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WorksheetsUnit 7 Instant Ice Quiz
Total questions: 19
Worksheet time: 28mins
What was the main purpose of the experiment?
To test different water types
To measure temperature changes
To make instant ice
To observe ice melting
What is the freezing point of water?
32°F
-8°C
100°C
0°C
What materials were used in the experiment?
Purified water, ice, and salt
Tap water, ice, and sugar
Glass bottles, ice, and salt
Purified water, sand, and salt
What happens to the freezing point of ice when salt is added?
The temperature increases
The temperature decreases
The temperature remains the same
The temperature becomes unstable
How long did the successful attempt take?
15 minutes
20 minutes
26 minutes
17 minutes
What was the temperature reached during the successful attempt?
-3°C
-10°C
0°C
-8°C
What is necessary for water to become supercooled?
The water must be pure and undisturbed
The water must be heated
The water must be impure
The water must be agitated
What was the result of the first attempt?
Water did not freeze
Water was half frozen
Ice melted immediately
Instant ice was formed
What did the teacher, Ms. Kwok, explain about the temperature needed for the experiment?
It must be above 0°C
It must be at least -8°C
It must be exactly 0°C
It must be below -10°C
What was observed during the second attempt?
Ice was floating
Water did not freeze
Water was boiling
Water crystallized instantly
What was the main factor for failure in the first attempt?
Water was agitated
Salt contaminated the water
Water did not fall below 0°C
Temperature was too high
What did the students do after each failed attempt?
They changed the water
They identified possible factors for failure
They stopped the experiment
They added more ice
What was the final observation during the successful attempt?
Water was half frozen
Water was boiling
Ice melted quickly
Ice crystals formed instantly
What is the necessary condition for instant ice to form?
Water must be agitated
Water must be supercooled to at least -8°C
Water must be heated
Water must be mixed with sugar
How many attempts were made to successfully create instant ice?
Seven
Six
Four
Five
Order the steps of making instant ice
Put a water bottle into the bowl
Fill a bowl with ice and salt
Use a/an thermometer to measure the temperature and wait till it falls to around -8℃
Carefully remove the bottle from the bowl
Slam the bottle on the table and watch the water instantly crystallize
1. I had to stop suddenly, and the car behind me (a) into the back of me. 2. Increasing the number of women in top management jobs will be a slow (b) . 3. (c) people have complained about the plans. 4. Did anyone (d) the attack? 5. The furniture was covered in (e) and cobwebs.
We use a digital (a) to measure the temperature.
Read the statements below and put (T) if it is correct and mentioned in the text, if not put (F)
Several bottles of water were used in the experiment to ensure there’s no ice in the bottles.
the water’s temperature has to fall to around -8 degree Celsius.
Only add ice continually to get a below freezing temperature.
Plastic bottles, large bowl, ice, salt, and a thermometer are the essential materials.
Salt has to be added into the water bottle to get a below freezing temperature.
Ice and salt must be added till the water bottler falls to around -8∘C.
Glass bottle must be used in the experiment.
