1. Why do some people have blue eyes and others have brown eyes?
2. Why is it important to exercise every day?
3. Why is it important to get enough sleep?
4. What is the difference between a bacterium and a virus?
5. How many chromosomes are in a human cell?
6. Why do we need water in our diet?
7. What is DNA?
8. What is the difference between an organism and an ecosystem?
9. How does the body protect itself from infections?
10. What are vitamins, minerals and nutrients, and what do they do for our bodies?
11. What are the functions of the kidneys?
12. How long can you live without water?
13. How do plants adapt to their environment?
14. What is an enzyme?
15. What happens when you eat too much sugar or salt?
16. What is the difference between an organism and a non-living thing?
17. What is the difference between a red blood cell and a white blood cell?
18. What are the 6 kingdoms of life?
19. Why do we need oxygen to breathe?
20. What are some examples of adaptation in animals?
21. How does light affect plant growth?
22. What is homeostasis and what organisms have it?
23. How do we get our energy from food?
24. Where does photosynthesis occur?
25. What are cells?
26. What is photosynthesis?
27. What happens when you get a cold or flu?
28. Are humans related to monkeys?
29. What is the process of digesting food?
30. What are the differences between a plant and an animal?
31. What is an organism?
32. What are the functions of the brain?
33. How does pressure affect the boiling point of water?