Personally, I haven't gotten enough questions to fill out this section. So I have included what I find to be questions people frequently ask in general.
Why is the sky blue?
The sky is blue because of the way sunlight interacts with our atmosphere.
To learn more visit: The Conversation
Why do some objects sink, while others float?
Whether an object sinks or floats depends on its density. Everything is made of molecules. Molecules are tiny particles that can only be seen with a microscope. Some objects have molecules that are packed closely together. Others have molecules that are packed more loosely. This is density. Objects with tightly packed molecules are denser and sink. A paper clip or a penny is dense. Objects with more loosely packed molecules are less dense and float. Wood, cork or sponges float.
Thanks Easy Science for Kids