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Science
7th
grade
S1 27/12 - Cold Case: The Mystery of the Melting Ice Cubes
5 questions
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- 1. Multiple Choice
Based on Raj's observation, which would be the most appropriate hypothesis?
Ice melts faster in Milo compared to plain water.
Ice melts faster when the temperature of the liquid is higher.
Does ice melt faster in Milo compared to water?
Does ice melt faster when the water is hotter?
- 2. Multiple Choice
Raj is setting up an experiment to test his hypothesis. What measures should he take to ensure this experiment is fair?
The cups should be made of different materials (e.g. glass, plastic, etc.)
The liquid in all 4 cups should be of different temperatures.
There should be a different number of ice cubes in each cup.
There should be different volumes of water in each cup.
- 3. Multiple Choice
Which of the following devices is the most suitable for measuring the time taken for the ice cubes to melt completely?
analog alarm clock
hourglass
IKEA analog clock in his living room
stopwatch application on his iPhone
- 4. Multiple Choice
Raj's results showed that his hypothesis is true. What should he do next?
Clean up and then rewatch all the Spiderman movies to celebrate.
Repeat the experiment and analyse the consistency of both results.
Restart the experiment with a brand new hypothesis.
Tell everyone about his successful experiment.
- 5. Multiple Choice
If Raj's results showed that his hypothesis was not true, what should he do next?
Check his experiment setup to see if all controlled variables are constant.
Create a new hypothesis and start again.
Give up, clean up and then rewatch all the Spiderman movies to cheer up.
Lie and tell everyone that his experiment was successful.
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