Real questions, really drawn

Each of these was made from a question like the one under it. Choose one to watch it drawn.

• How does the heart pump blood?Biology
• How does a volcano erupt?Earth science
• How does the solar system work?Astronomy
• Why is the sky blue?Physics
• Why do we have seasons?Earth science
• Explain gravity to a 10th grade studentPhysics
• What if the Sun suddenly vanished?Astronomy
• How does the universe work?Storyboard