Worksheet 4: "Time to Hibernate" – Students identify seasonal signs that prompt animals to hibernate, using images of a bear, snail, skunk, turtle, prairie dog, and ladybug.

Solution to "Time to Hibernate" Worksheet

This worksheet asks students to match each animal with the natural sign it might use to know it's time to hibernate. The word box provides six possible signs:

- leaves change color
- days get shorter
- leaves fall off the trees
- frost on the grass
- geese migrating
- smell winter in the air

We’ll analyze each animal and determine which sign is most likely used by that animal to signal hibernation time.

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#### 1. Bear (Green Box)
Answer: *leaves fall off the trees* or *days get shorter*

Explanation: Bears are large mammals that hibernate during winter. They rely on environmental cues such as decreasing daylight (days getting shorter) and changes in vegetation (like leaves falling) to know it’s time to prepare for hibernation. While both “days get shorter” and “leaves fall off the trees” are valid, “leaves fall off the trees” is a more visible and direct sign of fall transitioning into winter—perfect for a bear observing its surroundings.

✔ Best answer: leaves fall off the trees

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#### 2. Snail (Yellow Box)
Answer: *frost on the grass*

Explanation: Snails are cold-blooded and sensitive to temperature changes. They often retreat into hiding or become inactive when temperatures drop. Frost on the grass is a clear sign of freezing temperatures, which signals the snail to seek shelter and slow down activity. Since snails don’t migrate or see color changes in leaves, frost is a key indicator.

✔ Best answer: frost on the grass

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#### 3. Skunk (Blue Box)
Answer: *smell winter in the air*

Explanation: Skunks have a strong sense of smell and may detect changes in the air, like dampness, colder temperatures, or scents associated with winter. Though not all skunks hibernate (some are active year-round), many do enter a state of torpor. They could sense winter approaching through scent cues in the environment.

✔ Best answer: smell winter in the air

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#### 4. Turtle (Orange Box)
Answer: *frost on the grass* or *leaves fall off the trees*

Explanation: Turtles are ectothermic (cold-blooded) and go dormant in winter. They often burrow into mud at the bottom of ponds or hide under leaf litter. The appearance of frost indicates that water will freeze, so turtles must find shelter before this happens. Falling leaves also signal autumn and cooler weather.

✔ Best answer: frost on the grass (most direct sign)

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#### 5. Groundhog (Red Box)
Answer: *days get shorter*

Explanation: Groundhogs are known for their hibernation habits and are very sensitive to changes in daylight. As days grow shorter, their biological clocks trigger preparation for hibernation. This is a primary cue for many animals, including groundhogs.

✔ Best answer: days get shorter

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#### 6. Ladybug (Brown Box)
Answer: *leaves change color* or *smell winter in the air*

Explanation: Ladybugs are small insects that seek shelter in cracks, under bark, or in leaf litter when winter approaches. They may notice the changing colors of leaves (a visual cue) or sense cooler, drier air. However, since they can't see far, they’re more likely to react to temperature and air quality.

✔ Best answer: smell winter in the air

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✔ Final Answers:

| Animal | Sign Used to Know It's Time to Hibernate |
|------------|------------------------------------------|
| Bear | leaves fall off the trees |
| Snail | frost on the grass |
| Skunk | smell winter in the air |
| Turtle | frost on the grass |
| Groundhog | days get shorter |
| Ladybug | smell winter in the air |

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🔍 Summary:

Each animal uses different sensory cues from nature to detect seasonal changes. This exercise helps children understand how animals adapt to their environments and rely on natural signals to survive the winter.

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