Activity 1: Instructional Game. Estimated duration: 23 min
Dr. Popplebot's Underwater Endeavor
Dr. Popplebot has challenged you to prevent him from freezing all the oceans. To do this, you'll need to disarm his freeze ray. He has locked all the doors leading to the device with chemical sensors. You'll need to perform the correct balanced reactions in order to get through! Use your knowledge of the conservation of mass to open the doors and save our oceans!

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