Here are some science questions you can use:

Easy:

  1. What is the process by which plants make their own food?
  2. What gas do humans need to breathe in to survive?
  3. What is the boiling point of water in Celsius?

Moderate:

4. How does gravity affect objects on Earth?

5. What is the function of the human heart?

6. Why do we experience day and night?

Hard:

7. How does DNA determine the traits of an organism?

8. What is the difference between a chemical change and a physical change?

9. How do vaccines help prevent diseases?

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