We have been learning about and observing weather, but have you ever wondered why the sky is blue? Watch the video to find out more. Remember to answer in complete sentences using part of the question in your answer. Don't forget capitals and punctuation! 1. Tap the button. 2. Watch the video. 3. Use the tool to answer the questions in complete sentences. Remember to use part of the question in your answer. 4. Tap the button to add to your journal.