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Place the Micro:bit in your fridge and connect it to the battery

Place the tablet outside the refrigerator (but close by!)
Charge tablet fully or keep it connected to the charger.
Make sure the tablet is within range of Wi-Fi.
In settings, set your phone’s Display to Auto-Lock: Never or Screen timeout: Never

Set Up the Refrigerator Project

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Discuss the following after connecting to spreadsheet

Is the sensor quality good? Make sure every group member’s sensor works as expected. The sensor should also be logging data every minute to the spreadsheet.

Be patient here! You need to wait the full minute to see the new row of data on the spreadsheet.

Notice how the graphs depict data every 2 seconds while the spreadsheet logs data only every 1 minute:

Why do you think that’s the case? (Google Sheets has certain limits on how often you can update the sheet. Hence, logging data every 2 seconds would overload the spreadsheet, especially for 48 hours straight.)
Can you guess how the 2-second graph data is converted to 1-minute data on the spreadsheet? Note how each spreadsheet row records both an average and a max value for each sensor type (columns C -F)

COLUMNS:

A: sequential index

B: timestamp (per minute)

C: Light average

D: Light max

E: Temp (f) average

F: Temp (f) max

Here Sensor 1 and Sensor 2 correspond to the top and bottom graphs on the app.

Design a Research Question for Your Team’s Fridge Project

A good research question is:

Clear: Provides enough specifics that one’s audience can easily understand its purpose without needing additional explanation.
Focused: Narrow enough that it can be answered thoroughly in the amount of time you have.
Concise: Expressed in the fewest possible words.
Complex: The question should not be answerable with a simple “yes” or “no,” but rather requires synthesis and analysis of ideas and sources.

Research Question Examples

How does the amount of daily screen time affect sleep quality in students?
How does the frequency of homework assignments affect stress levels in students?
How does participation in after-school sports affect academic performance in students?
How does time spent reading books affect vocabulary development in students?

Research Question for the Fridge Project

Template:

"How will the _______ relate to ________ in the ___________?"

Add a Hypothesis

Template:

Variable 1 is light data and Variable 2 is temperature data.

Enter your group’s hypothesis below:

If we see an increase in change in Variable 1, then we will see _______ change in Variable 2, because _______.

Hypothesis Examples

If the amount of daily screen time increases, then the sleep quality of students will decrease because excessive screen time can interfere with the natural sleep-wake cycle and cause sleep disturbances.
If the frequency of homework assignments increases, then the stress levels of students will also increase because a higher volume of homework can lead to greater academic pressure and less time for relaxation.
If students participate in after-school sports, then their academic performance will improve because physical activity has been shown to enhance cognitive function and reduce stress, leading to better focus and learning outcomes.
If students spend more time reading books, then their vocabulary development will improve because reading exposes them to new words and contexts, enhancing their language skills.