Recommended for upper elementary school students! True-or-false quizzes that make you think

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The northernmost prefecture in Japan is Hokkaido. It is very large—about six times the size of Shikoku. Winters bring a lot of snow and are very cold, but summers are cool and rich in nature. It’s also famous for its lavender fields, delicious milk, and seafood.

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Water turns into ice at 0°C. This is because the water molecules slow down, stick together, and solidify. However, if salt or sugar is mixed in, the freezing temperature drops a little. Snow and ice are 'transformations of water' that can be seen in nature during winter.

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Turtles are what’s called cold-blooded animals, meaning their body temperature changes with the outside temperature. When winter comes, their bodies cool down, they become sluggish, and they go into hibernation to rest quietly. When spring arrives and it gets warmer, they become active again. They have a period of rest to survive in nature.

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The size of an ant’s body varies depending on its role. The queen ant is very large and lays many eggs. Worker ants are medium-sized; they clean the nest and gather food. Soldier ants are strong and somewhat larger, and they protect the nest.

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Male rhinoceros beetles have large horns. These serve as weapons for fighting other males over females. The size of the horn also serves as an indicator of strength. Females do not have horns; they feed on tree sap and lay eggs.

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Whales are not fish; they are mammals. They breathe with lungs, give birth to live young, and nurse them with milk. Unlike fish, they do not breathe through gills. Their bodies are adapted to swimming in water like fish, but their biology and the way they are born place them with mammals, just like humans and elephants.

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Hedgehogs protect themselves from enemies by curling up and pointing their spines outward. The spines are very hard, but they don't stab people like needles. They have an instinct to curl up when they feel threatened, which is one way they escape predators. Even with their small bodies, they are creatures that have the wisdom to protect themselves.