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5. Mitu viilu leiba ja mitu klaasi piima peaksid jooma,
et saada terveks päevaks vajalik kogus energiat? .............................................................................. ............................................................................. ............................................................................. ............................................................................. |
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6. Miks ei saa olla ükski mootor 100% kasulik?
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7. Selgita, miks on
ohtlik äikese ajal ujuda! ..................................................................................................................... |
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8. Selgita, miks on eelistatumad kütused maailmas nafta ja kivisüsi!
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9. Püüa selgitada, miks saab järjest populaarsemaks tuule- ja päikeseenergia
kasutamine!
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