- Which factors are related with the way that we get older?
- Which of these factors can you controlled?
- Which are the habits that you can change in order to get that factors under control?
2) Why does a tornado spin?
- Which factors apart from the wind take part in a tornado?
- Can you explain the mechanism of a tornado?
- What can we do to predict it?
3) Why does lightning strike?
- Which materials do you think that are related with the lightning?
- Do you think that lightnings touch the ground?
- Which kind of field is related with lightnings?
4) What do you know about the ants?
- Do you know if the ants of the same nest smell alike?
- What do ants do when they meet?
- If their scents are unfamiliar, what do they do?
5) What does a plant need to grow?
- How do they carry water from the soil to their leaves?
- Do you know what the differences between the xylem and the phloem are?
- What is the chlorophyll?
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