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Some animals sleep through the cold winter to stay safe.

Some animals sleep through the cold winter to stay safe.

This long winter sleep is called hibernation. Bears and other animals rest until the warm weather comes back.

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Many trees drop their leaves in autumn. Many trees drop their leaves in autumn. In spring, lots of baby animals are born. In spring, lots of baby animals are born. Summer days have more hours of sunshine than winter days. Summer days have more hours of sunshine than winter days. We get seasons because Earth is tilted as it circles the Sun. We get seasons because Earth is tilted as it circles the Sun. Near the North Pole, the summer Sun can shine even at midnight. Near the North Pole, the summer Sun can shine even at midnight.