Buster Beaker explains how high and low tides are affected by the gravity of the moon and the sun. He illustrates the phenomenon using a cookie, a mushroom, and a lemon.
Senku explains and demonstrates how "food" involves science. He also proceeds to create a dish from scratch using foxtail millet as a substitute for wheat grains to make ramen.
A farmer lacks enough water to be able to plant crops in her fields. She connects with a Water EFX, a company that found a way to use tainted water to irrigate farms.