"Read about when is it winter in North America. Why winter weather is cold, where do animals go in the winter, and what do people do in the winter."--Provided by publisher. Contents: What is winter? -- When is it winter in North America? -- Why is winter weather cold? -- Why does winter weather bring snow and ice? -- What happens to plants in the winter? -- Where do animals go in the winter? -- What is hibernation? -- What do people do in the winter? -- Experiment. Interest Level: K-3 Reading Level: 2.0 Lexile Measure: 640 Guided Reading Level: H.