What is the difference between a solid, a liquid, and a gas?, Why do plants need sunlight to grow?, What are the main parts of the water cycle?, How does the human heart help the body?, What is a food chain? Give an example., Why is the Sun important for life on Earth?, What causes day and night?, What are the five senses, and what does each one do?, How can we reduce pollution in our environment?, What is gravity, and how does it affect us every day?

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