Careful observation of the sun and moon can answer many questions we have about our planet. What causes day and night? Why do the seasons change? What causes the changing shape of the moon? How can you tell time by watching shadows from the sun? Robert Gardner guides young students in their observations, using simple science experiments. Detailed explanations follow the experiments to explain the science used in each experiment, along with unique ideas for your own science fair project. Supports the National Science Education Standards for K–4 Earth and Space Science.